Q. What happens when a drop of glycerol is added to crushed KMnO4 spread on a paper ?
1) There is a violent explosion
2) There is no reaction
3) The paper ignites
4) There is a crackling sound
Q. Which of the following is used in the preparation of Nuclear bombs?
1) Zirconium
2) Uranium
3) Molybdenum
4) Vanadium
Q. Bauxite is the ore of -
1) Iron
2) Zinc
3) Tin
4) Aluminium
Q. The Chemical formula of baking soda is -
1) NaHCO3
2) Na2CO3
3) Ca(OH)2
4) CaCO3
Q. Calcium carbide is used for artificial ripening of green fruits because it produces -
1) Auxin
2) Florigen
3) Methylene
4) Acetylene
Q. Brass is an alloy of -
1) copper and iron
2) zinc and iron
3) copper and zinc
4) iron and nickel
Q. Soda water obtained by passing carbon dioxide in water is -
1) an oxdising agent
2) basic in nature
3) acidic in nature
4) a reducing agent
Q. Which of the following acids does not contain oxygen ?
1) Nitric acid
2) Sulphuric acid
3) Hydrochloric acid
4) All of the above
Q. Baking soda is -
1) sodium carbohydrate
2) sodium bicarbonate
3) sodium sulphate
4) sodium hydroxide
Q. The atomic nucleus was discovered by -
1) Rutherford
2) Dalton
3) Einstein
4) Thompson
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