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Question:- Diamond is an allotropic form of A. germanium B. carbon C. silicon D. sulphur
Answer:- Option B
Question:- In fireworks, the green flame is produced because of A. sodium B. barium C. mercury D. potassium
Answer:- Option B
Question:- Permanent hardness of water can be removed by adding A. chlorine B. washing soda C. potassium permanganate D. bleaching powder
Answer:- Option B
Question:- Marsh gas is A. nitrogen B. ethane C. methane D. hydrogen
Answer:- Option C
Question:- LPG consists of mainly A. methane, ethane and hexane B. ethane, hexane and nonane C. methane, hexane and nonane D. methane, butane and propane
Answer:- Option D
Question:- Air is a/an A. compound B. element C. electrolyte D. mixture
Answer:- Option D
Question:- Production of chlorofluorocarbons (CFC) gas which is proposed to be banned in India, is used in which of the following domestic products? A. Television B. Refrigerator C. Tube light D. Cooking gas
Answer:- Option B
Question:- Balloons are filled with A. nitrogen B. helium C. oxygen D. argon
Answer:- Option B
Question:- Which of the following does not contain a coinage metal? A. Silver and Gold B. Zinc and Gold C. Copper and Silver D. Copper and Gold
Answer:- Option B
Question:- Which metal pollute the air of a big city? A. Copper B. Chromium C. Lead D. Cadmium
Answer:- Option C
Question:- Bell metal is an alloy of A. nickel and copper B. zinc and copper C. brass and nickel D. tin and copper
Answer:- Option D
Question:- Water is a good solvent of ionic salts because A. it has a high specific heat B. it has no colour C. it has a high dipole moment D. it has a high boiling point
Answer:- Option C
Question:- Which of the following is not an isotope of hydrogen? A. Tritium B. Deuterium C. Protium D. Yttrium
Answer:- Option D
Question:- The main constituents of pearls are A. calcium oxide and ammonium chloride B. calcium carbonate and magnesium carbonate C. aragonite and conchiolin D. ammonium sulphate and sodium carbonate
Answer:- Option B