Balbharti Maharashtra State Board Class 9 Science MCQ Chapter 14 Substances in Common Use by www.phdsciencegyan.com
1) Chemical name of bleaching powder is …………… .
A ) Calcium oxy chloride
B ) Calcium chloride
Ans A ) Calcium oxy chloride
2 ) Bleaching powder react rapidly with acid to release chlorine gas.
A ) Dilute sulphuric acid
B ) Concentrate Nitric acid
C ) Acetic acid
D ) Dilute hydrochloric acid
Ans A ) Dilute sulphuric acid
3 ) When fused common salt is electrolyzed, the chlorine gas is obtained at …………… .
A ) Cathode
B ) Anode
Ans B ) Anode
4) compounds are most harmful chemicals in the deodrants.
A ) Zirconium B ) Aluminum C ) Both 1 & 2
D ) None of above
Ans C ) Both 1 & 2
5) Ca(OH)2 + Cl2 → CaOCl2 + ……………
A ) H2O
B ) CaOCl2
Ans A ) H2O
6) Fused State of the Comman Salt (NaCl) is obtained at what temperature.
A ) 4000 c B ) 5000 c C ) 6000 c D ) 8000 c
Ans D ) 8000 c
7) Sodium chloride is used for the production of salts like …………… .
A ) Sodium carbonate
B ) Potassium carbonate
Ans A ) Sodium carbonate
8) The radioactive elements produced in the nuclear fission processes brought about in the laboratory by bombardments of particles are called artificial radioactive elements.
A ) True
B ) False
Ans A ) True
9) Name the rays that deviated substantially towards the positively charged plate.
A ) Alpha
B ) Beta
C ) Gamma
Ans B ) Beta
10) During anodizing,where is the aluminium article placed in the electrolytic cell?
A ) Anode
B ) Cathode
Ans A ) Anode
11.) What is the nature of the salt made from a strong acid and a weak base?
A ) Acidic B ) Basic C ) Neutral
Ans A ) Acidic
12.) Table salt has a pH value of …………… .
A ) 6
B ) 7
C ) 8
Ans B ) 7
13) It has strong odour of chlorine gas.
A ) Bleaching Powder B ) Washing Powder C ) Table Salt
D ) Baking Soda
Ans A ) Bleaching Powder
14) A natural product that is considered safe for dying hair.
A ) Henna B ) Brahmi C ) Hibiscus
Ans A ) Henna
15) The red colour used on Rang panchami or Holi Contains.
A ) Lead
B ) Mercury C ) Rock salt D ) Carmine
Ans B ) Mercury
16) The hardness of water is due to the presence of sulphates and chlorides of …………… .
A ) Calcium
B ) Potassium
C ) Sodium
Ans A ) Calcium
17) Has a strong odour of chlorine gas.
A ) Calcium chloride
B ) Calcium oxide
C ) Bleaching powder
D ) Baking powder
Ans C ) Bleaching powder
18) Ingredient of Baking powder is.
A ) Sodium Chloride
B ) Sodium bicarbonate
C ) Sodium Nitrate
D ) Aluminium Chlorid
Ans B ) Sodium bicarbonate
19) Bordeaux mixture is used as a fungicide on fruits like grapes.
A ) True
B ) False
Ans A ) True
20) The number of molecules of water of Crystalization in washing soda is.
A ) 10
B ) 8
C ) 9
D ) 12
Ans A ) 10
21) Teflon is a good conductor of electricity.
A ) True
B ) False
Ans B ) False
22) Dying hair can lead to burning of skin.
A ) True
B ) False
Ans A ) True
23) is said to be rich source of salt.
A ) Sea water B ) Rain water C ) Tap water
Ans A ) Sea water
24) Which radio-active isotopes are used for curing Bone cancer.
A ) Radio isobar
B ) Strontium -89 | Strontium 90 | Samarium – 153 | Radium – 223
C ) Carbon isotope
D ) Oxygen isotope
Ans B ) Strontium -89 | Strontium 90 | Samarium – 153 | Radium – 223
25) Mineral halite and Himalayan rock salt are examples of …………… .
A ) Rock salt
B ) Sea salt
Ans A ) Rock salt
26) Discovered the radio activity radiations.
A ) Rutherford
B ) Newton
C ) Kevin Becqueral
D ) Henry Becquerel
Ans D ) Henry Becquerel
27 ) MgCl2 + Na 2CO3 → MgCO3 + ……………
A ) 2NaCl
B ) CO2
Ans A ) 2NaCl
28) Odd one out: Alum, Borax, Epsom salt, Table salt
A ) Borax
B ) Epsom salt C ) Table salt D ) Alum
Ans C ) Table salt
29) The elements with atomic numbers 82 to 92 are called natural radioactive elements.
A ) True
B ) False
Ans A ) True
30) Use of Deodorants can cause skin disorders.
A ) True
B ) False
Ans A ) True
31) When soap is mixed with hard water, calcium salts of fatty acids are formed.
A ) True
B ) False
Ans A ) True
32) Which of the following salts do not have water of crystallization?
A ) Sodium carbonate B ) Sodium bicarbonate C ) Sodium sulphate
D ) Magnesium sulphate
Ans B ) Sodium bicarbonate
33) Food colors are mixed in soft drinks.
A ) True
B ) False
Ans A ) True
34) Sodium carbonate is hygroscopic in nature.
A ) True
B ) False
Ans A ) True
35) Tetrazene is a natural food color.
A ) True
B ) False
Ans B ) False
36) Salt that can be used to clean the oven.
A ) Baking soda
B ) Washing soda
Ans A ) Baking soda
37) is used for treatment of disease called polycythemia.
A ) Phosphorus -32 B ) Phosphorus – 23 C ) Phosphorus – 123
Ans A ) Phosphorus -32
38) Odd one out: Boron-10, Iodine -131, Cobalt-60, Radium-223
A ) Iodine -131
B ) Cobalt-60
C ) Radium-223
D ) Boron-10
Ans C ) Radium-223
39) colors are used to make street boards that are visible at night.
A ) Fluorescent
B ) Vibrant
C ) Luminescence
Ans A ) Fluorescent
40) Name the property of alum which helps to purity water.
A ) Osmosis
B ) Coagulation C ) Bleaching D ) Diffusion
Ans B ) Coagulation
41) is used for coating cooking utensils.
A ) Rayon B ) Nylon C ) Teflon
Ans C ) Teflon
42) Used in the process of water purification.
A ) Alum B ) Vitriol C ) Borax
D ) Epson salt
Ans A ) Alum
43) is a hard, translucent and white colored ceramic.
A ) Advanced ceramic
B ) Porcelain
C ) Bone china
Ans B ) Porcelain
44) The elements with atomic numbers are radio active in nature.?
A ) Less than 80
B ) From 82-92
C ) Less than 8
D ) 14
Ans B ) From 82-92
45) Clay is used in.
A ) Ceramics
B ) Deodorant
C ) Advanced ceramics
D ) Oaking soda
Ans A ) Ceramics
46) Phosphorus-32 : polycythemia :: Radium 223 : …………… .
A ) Bone cancer
B ) Brain tumor
Ans A ) Bone cancer
47) When fused common salt is electrolyzed, liquid(molten) sodium metal is obtained at …………… .
A ) Cathode
B ) Anode
Ans A ) Cathode
48) Used for washing clothes.
A ) Baking Soda B ) Washing soda C ) Baking powder D ) Pop
Ans B ) Washing soda
49) Carmine is dye used in.
A ) Powder B ) Lipstic C ) Kajal
D ) Foundation
Ans B ) Lipstic
50) Petroleum products and are used in the preparation of artificial dyes.
A ) Minerals
B ) Oxides
Ans A ) Minerals
51) NaHCO3 Sodium bicarbonate is used to
A ) Refining petrodeum
B ) Washing clothes
C ) Making ceramics
D ) Reduce acidity from stomach
Ans D ) Reduce acidity from stomach
52) Name the scientist who inferred that the uranium compounds might be emitting rays like X- rays.
A ) Henry Becquerel
B ) Madam Curie
C ) Rutherford
Ans A ) Henry Becquerel
43) The central nervous system is affected by radioactive radiations.
A ) True
B ) False
Ans A ) True
54) What is the nature of the salt made from weak acid and a strong base?
A ) Acidic B ) Basic C ) Neutral
Ans B ) Basic
55) Natural radio active element contain atomic number.
A ) 80 – 92
B ) 80 – 90
C ) 82 – 90
D ) 82 – 92
Ans D ) 82 – 92
56) Dyes are used to polish purses.
A ) True
B ) False
Ans A ) True
57) The substance that is used to fix the color after dying a cloth.
A ) Mordant
B ) Sintering
Ans A ) Mordant
58) Reduce acidity in the stomach.
A ) Na2CO3
B ) Na2CO3 . 10H2O
C ) NaHCO3
D ) NaCl
Ans C ) NaHCO3
59) The chemical formula of slaked lime is …………… .
A ) Ca(OH)2
B ) CaCO3
Ans A ) Ca(OH)2
60) deo is used to decrease the extent of sweating.
A ) Ordinary
B ) Antiperspirant
C ) Clinical
Ans B ) Antiperspirant
61) The person who invented an artificial dye.
A ) William Henry Perkin
B ) William Stefan Perkin
Ans A ) William Henry Perkin
62) The large scale use of deo in adolescents is due to advertisements on television.
A ) True
B ) False
Ans A ) True
63) When epson salt is heated, the water of crystallization is given out and it forms ……………..
A ) Brown amorphous powder
B ) Brown powder
C ) White amorphous powder
D ) White Crystalline powder
Ans C ) White amorphous powder
64) Anti perspirant deo contains 15% of ……………
A ) Aluminium chlonde
B ) Aluminium chlorohydrate C ) Aluminium hydrochlorate D ) Aluminium chlorate
Ans B ) Aluminium chlorohydrate
65) A certain type of ceramic tile are fixed on the outer layer of a space shuttle.
A ) True
B ) False
Ans A ) True
66) Substance used for disinfecting garbage sites.
A ) Sodium carbonate B ) Sodium bicarbonate C ) Bleaching powder
Ans C ) Bleaching powder
67) Sodium bicarbonate is used in the preparation of CO2 in the fire Extinguisher
A ) True
B ) False
Ans A ) True
68) The nucleus of radioactive elements is stable.
A ) True
B ) False
Ans B ) False
69) deo contains a smaller proportion of aluminum.
A ) Ordinary
B ) Antiperspirant
C ) Clinical
Ans A ) Ordinary
70) Substance used to make hard water soft.
A ) Sodium carbonate B ) Sodium bicarbonate C ) Bleaching powder
Ans A ) Sodium carbonate
71) Is radium a radioactive substance?
A ) Yes
B ) No
Ans A ) Yes
72) Crystalline sodium carbonate on keeping , loses its water of crystallization and forms yellow powder.
A ) True
B ) False
Ans B ) False
73) Water gas is a mixture of …………… .
A ) (CO + N2)
B ) (CO + H2) C ) (CO2 + H2) D ) (CO + H2O)
Ans B ) (CO + H2)
74) Radium – 223 is used in the treatment of cancer.
A ) Bone B ) Brain C ) Skin
Ans A ) Bone
75) The chemical formula of baking soda is
A ) NaHCO3
B ) NaCl
C ) Na2CO3
D ) CaCO3
Ans A ) NaHCO3
76) Ceramics can withstand high temperatures without decomposing.
A ) True
B ) False
Ans A ) True
77) The chemical formula of sodium carbonate is …………… .
A ) NaHCO3
B ) NaHCO3. 10H2O
C ) Na2CO3
D ) Na2CO3..H2O
Ans C ) Na2CO3
78) The atmosphere and chemical substances have no effect on Teflon.
A ) True
B ) False
Ans A ) True
79) deo is used by people who sweat heavily.
A ) Ordinary
B ) Antiperspirant
C ) Clinical
Ans C ) Clinical
80) Lipstick contains a dye named …………… .
A ) Carmine
B ) Carbide
Ans A ) Carmine
81) Substance used in refining of petrol.
A ) Sodium carbonate B ) Sodium bicarbonate C ) Bleaching powder
Ans A ) Sodium carbonate
82) Formula of Blue Vitriol used in blood test is.
A ) CuSo4 . 7H2o B ) CuSo4 . 5H2o C ) CuSo4 . 2H2o D ) CuSo4
Ans B ) CuSo4 . 5H2o
83) Gamma rays have no mass.
A ) True
B ) False
Ans A ) True
84) What is the reaction between sodium hydroxide and hydrochloric acid called ?
A ) Neutralisation reaction
B ) Oxidaton reaction
C ) Reduction reaction
Ans A ) Neutralisation reaction
85) Soap cannot be used in hard water because they
A ) Are too greasy B ) Form precipitate C ) Contain sodium
D ) Create environmental problems
Ans B ) Form precipitate
86) Discovered the natural radio activity.
A ) Honry banetonte B ) Henry Becquerel C ) Kecin Becquerel
D ) Newton Becquerelnewton
Ans B ) Henry Becquerel
87) Sodium carbonate is …………… .
A ) CaO
B ) Na2CO3
C ) NaHCO3
D ) NaCl
Ans B ) Na2CO3
88 ) CaOCl2 + CO2 → …………… + Cl2 A ) CaCO3
B ) Ca(OH)2
Ans A ) CaCO3
89 ) NaHCo3 is ……………..
A ) Table Salt B ) Rock Salt C ) Salt
D ) Basic Salt
Ans D ) Basic Salt
90) Urea was prepared / Synthesised for the first time by …………… .
A ) Robert Curl
B ) Richard Smalley
C ) Wohler
D ) Karl Scheele
Ans C ) Wohler
91) Name the rays that did not deviate at all.
A ) Alpha
B ) Beta
C ) Gamma
Ans C ) Gamma
92) Rang Panchami colors contain a high proportion of …………… .
A ) Mercury
B ) Lead
C ) Sulphur
Ans A ) Mercury
93) What is the full form of ESD?
A ) Electrostatic Spray Deposition
B ) Electronic Spray Deposition
Ans A ) Electrostatic Spray Deposition
94) The colored substance which on applying to an article, imparts that color to the article.
A ) Drugs
B ) Dyes
Ans B ) Dyes
95) Radiography is used for detecting flaws in metal work.
A ) True
B ) False
Ans A ) True
96) A dye is insoluble in water and soluble in oil.
A ) True
B ) False
Ans B ) False
97) Chlorine gas is a strong reducing agent.
A ) True
B ) False
Ans B ) False
98) What is the nature of the salt made from strong acid and strong base?
A ) Acidic B ) Basic C ) Neutral
Ans C ) Neutral
99) What is one environmental problem associated with the use of detergents?
A ) Global warming
B ) Erosion
C ) Eutrophication
D ) Photochemical smog
Ans C ) Eutrophication
100) Name the rays that deviated slightly towards the negatively charged plate.
A ) Alpha
B ) Beta
C ) Gamma
Ans A ) Alpha
101) Sodium bicarbonate: NaHCO3 :: Calcium oxychloride : ……………
A ) CaOCl2 B ) Na2CO3 C ) NaHCO3
D ) NaCl
Ans A ) CaOCl2
102) Radioactive elements have high atomic number.
A ) True
B ) False
Ans A ) True
103) Dilute hydrochloric acid reacts rapidly with bleaching powder to release chlorine gas.
A ) True
B ) False
Ans A ) True
104) Identify Radio active element.
A ) Sodium
B ) Aluminium
C ) Radium
D ) Potassium
Ans C ) Radium
105) In Kashmir, a good dye is made from saffron.
A ) True
B ) False
Ans A ) True
106) Clinical deo contains % of aluminium.
A ) 15 – 20%
B ) 28%
C ) 20 – 25%
D ) 14%
Ans C ) 20 – 25%
107) Powder coating is highly durable, hard and attractive.
A ) True
B ) False
Ans A ) True
108) Washing Soda: :: Table salt : Sodium chloride.
A ) Sodium carbonate
B ) Tartaric acid
C ) Slaked lime
Ans A ) Sodium carbonate
109) Leflon is the polymer of.
A ) Tetrafluoroethylene
B ) Lhorivin C ) Plutonium D ) Cadmium
Ans A ) Tetrafluoroethylene
110) Ceramic is hard, water resistant and an electric insulator.
A ) True
B ) False
Ans B ) False
111) Which radio active isotope is used for food preservation.
A ) Strontium 90 B ) Strontium 60 C ) Cobalt 40
D ) Cobalt 60
Ans D ) Cobalt 60
112) Magnesium chloride is an important salt found in the sea water.
A ) True
B ) False
Ans A ) True
113) Name the harmful elements present in the food colors that are added to jam and pickles.
A ) Lead and mercury
B ) Lead and phosphorus
Ans A ) Lead and mercury
114) Artificial colors cause risks like blindness.
A ) True
B ) False
Ans A ) True
115 ) Na2CO3 + H2SO4 → Na2SO4 + H2O + ……………
A ) CO2
B ) 2NaCl
Ans A ) CO2
116) The main source of color for preparing a natural dye.
A ) Plants B ) Roots C ) Seeds
Ans A ) Plants
117) Odd man out: Uranium, thorium, barium, radium
A ) Thorium B ) Barium C ) Radium D ) Uranium
Ans B ) Barium
118) White crystalline solid salt used to make hard water soft and potable by using.
A ) Na2So4
B ) NaCl
C ) Na2Co3
D ) NaCl . 10H2o
Ans C ) Na2Co3
119) Name dye used in lipstick.
A ) Carmine
B ) Teflon
C ) Baked lime
D ) Iodine 131
Ans A ) Carmine
120) Artificial food colour are present in the form of A ) Powder
B ) Gels
C ) Pastes
D ) All
Ans D ) All
121) What is used as raw material in the preparation of bathing soap?
A ) High grade fats and oils
B ) Low grade fats and oils
Ans A ) High grade fats and oils
122) Producer gas is a mixture of ……………
A ) (CO + H2)
B ) CO + H2 + CO2 + N2
C ) (CO + N2)
D ) (CO2 + N2)
Ans B ) CO + H2 + CO2 + N2
123) The Chemical formula of Slaked lime is
A ) Cacl2
B ) Cao
C ) Ca(OH)2
Ans C ) Ca(OH)2
124) Pots made by potter is an example of ……………
A ) Ceramic
B ) Porcelain
C ) Bone china
Ans A ) Ceramic
125) The radioactive paint on the watch can cause asthma.
A ) True
B ) False
Ans B ) False
126) Blue vitriol is used for.
A ) Blood test for diagnosing anaemia
B ) Purification of water
C ) Glassand paper industry
D ) Used to purify water
Ans A ) Blood test for diagnosing anaemia
127) Detection of small tumours in the body radio active used.
A ) Radium – 223
B ) Arsenic – 74
C ) Cobalt – 60
D ) Iodine – 131
Ans B ) Arsenic – 74
128) A white clay called kaolin is found in China.
A ) True
B ) False
Ans A ) True
129) Used in the glass and paper industry.
A ) Washing Soda
B ) Baking Soda
C ) Bleaching powder
D ) Slaked like
Ans A ) Washing Soda
130) After the Chernobyl disaster, genetic disorders were passed on to the next generation.
A ) True
B ) False
Ans A ) True
131) The chemical name of table salt is …………… .
A ) Sodium chloride
B ) Sodium carbonate
Ans A ) Sodium chloride
132) White vitriol is used in the blood test for diagnosing anaemia.
A ) True
B ) False
Ans B ) False
133) Arsenic – 74 is used in the detection of small tumours in the body.
A ) True
B ) False
Ans A ) True
134) is used in the treatment of hyperthyroidism.
A ) Iodine -123
B ) Iodine – 231
Ans A ) Iodine -123
135) Name the process in which the ceramic requires high temperature and an oxygen free atmosphere for firing.
A ) Sintering
B ) Stintering
Ans A ) Sintering
136 ) CaOCl2 + H2SO4 → …………… + Cl2 + H2O A ) CaSO4
B ) Na2CO3
Ans A ) CaSO4
137) Are not deflected by electrical field and magnetic field.
A ) ∝ rays (alpho rays)
B ) β rays (Beta rays)
C ) γ rays (gamma rays)
D ) X rays
Ans C ) γ rays (gamma rays)
138) is used to make bread, cake and dhokla fluffy.
A ) Sodium bicarbonate
B ) Sodium carbonate
Ans A ) Sodium bicarbonate
139) Which salt is used in the preparation of Chlorine gas?
A ) Calcium chloride
B ) Sodium carbonate
C ) Sodium bicarbonate
D ) Calcium oxy chloride
Ans D ) Calcium oxy chloride
140) Sodium chloride is acidic in nature.
A ) True
B ) False
Ans B ) False
141) Food Colour is added in.
A ) Pickles, Sauce, Jam
B ) Dye clothes
C ) Hair dye
D ) Lipstick
Ans A ) Pickles, Sauce, Jam
142) Anodizing is done by ……………
A ) Galvanization
B ) Electrolysis
Ans B ) Electrolysis
143) Methane was discovered by ……………
A ) Alessandro Volta
B ) Harold Kroto
C ) Wohler
D ) Fuller
Ans A ) Alessandro Volta
144) Deodorants contain Parabens like Methane, ethane, etc.
A ) True
B ) False
Ans B ) False
145) Onions, potatoes are irradiated with rays.
A ) Alpha
B ) Beta
C ) Gamma
Ans C ) Gamma
147) Radioactive elements are used only for making atom bomb.
A ) True
B ) False
Ans B ) False
148) Which acid used in the electrolytic cell during anodizing.
A ) Dil HCl
B ) Dil H2SO4
Ans B ) Dil H2SO4
149) Excessive use of plants for making natural dyes result in deterioration of environment.
A ) True
B ) False
Ans A ) True
150) Powder coating cannot be done on plastic and medium density fibre.
A ) True
B ) False
Ans B ) False
151) The chemical formula of washing soda is …………… .
A ) NaHCO3
B ) NaHCO3 10H2O
C ) Na2CO3
D ) NaHCO3 H2O
Ans C ) Na2CO3
152) Alpha rays have same velocity of light.
A ) True
B ) False
Ans B ) False
153) The 25% aqueous solution of salt is called …………… .
A ) Salt solution
B ) Brine
Ans B ) Brine
154) CaOCl2 reacts with which gas to form calcium carborate.
A ) H2
B ) Cl2 C ) CO2 D ) O2
Ans C ) CO2
155) Which one of the following will turn red litmus blue?
A ) Vinegar
B ) Baking soda solution
C ) Lemon juice
D ) Soft drinks
Ans B ) Baking soda solution
156) Name the scientist who discovered that the radiations emitted by radium were of two types.
A ) Henry Becquerel
B ) Madam Curie
C ) Rutherford
Ans C ) Rutherford
157) Radioactive radiation can penetrate the skin, and cause leukemia.
A ) True
B ) False
Ans A ) True
158) The radioactive isotope cobalt-60 is used for food ……………
A ) Preservation
B ) Packaging
Ans A ) Preservation
159) Chemical formula of Common Salt
A ) KoH
B ) K2SO4
C ) NaoH
D ) NaCl
Ans D ) NaCl
