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question_answer1) Metal which occur in free state as well as in combined state is ____. (a) Copper (b) Silver (c) Gold (d) Platinum
question_answer2) The metal that occurs in free state in the earth's crust is: (a) Gold (b) Silver (c) Platinum (d) All the above
question_answer3) The most abundant metal in earth's crust is: (a) Oxygen (b) Aluminium (c) Gold (d) Platinum
question_answer4) The second most abundant non metal in earth's crust is: (a) Phosphorus (b) Sulphur (c) Silicon (d) Oxygen
question_answer5) The basic oxides reacts with acids to form (a) Salt (b) Water (c) Metalloid (d) All
question_answer6) A and B are products when Fe reacts with steam. Identify A and B. (a) \[F{{e}_{3}}{{O}_{4}},{{H}_{2}}O\] (b) \[F{{e}_{2}}{{O}_{3}},{{H}_{2}}O\] (c) \[F{{e}_{3}}{{O}_{4}},{{H}_{2}}\] (d) \[F{{e}_{2}}{{O}_{3}},{{H}_{2}}\]
question_answer7) When steam is passed through zinc, then (a) Hydrogen gas is liberated (b) Zinc hydroxide is formed (c) Zinc oxide is formed (d) None
question_answer8) Fizzy drinks are ______. (a) Basic (b) Acidic (b)Amphoteric (d) Soft
question_answer9) 'X? reacts with oxygen to form a compound 'Y? 'Y' on reaction with water forms a new substances 'Z' that turns blue litmus red. Identify X, Y and Z respectively. (a) Metal, metallic oxide, base (b) Non-metal, non-metallic oxide, acid (c) Metal, metallic oxide, neutral solution (d) Metalloid, metalloid oxide, neutral solution
question_answer10) Identify X, Y, Z and K. X Y Z K (a) \[{{H}_{2}}O\] \[{{O}_{2}}\] \[MgO\] \[Mg{{(OH)}_{2}}\] (b) \[{{O}_{2}}\] \[N{{a}_{2}}{{O}_{2}}\] \[Mg\] \[MgO\] (c) \[{{O}_{2}}\] \[N{{a}_{2}}O\] \[MgO\] \[Mg{{(OH)}_{2}}\] (d) \[{{H}_{2}}O\] \[{{O}_{2}}\] \[Mg{{(OH)}_{2}}\] \[MgO\]
question_answer11) Assertion (A): Sodium reacts with water, producing a hissing sound. Reason (R): Sodium reacts with water and produces hydrogen gas. (a) Both Assertion and Reason are correct and Reason is the correct explanation of Assertion. (b) Both Assertion and Reason are correct but Reason is not the correct explanation of Assertion. (c) Assertion is correct and Reason is incorrect. (d) Assertion is incorrect and Reason is correct
question_answer12) Statement (A): Sodium and potassium are highly reactive metals. Statement (B): Sodium and potassium are stored under water. (a) Statement 'A' is true, statement 'B' is false. (b) Statement 'B' is false, statement 'A' is true. (c) Both statements, 'A' and ?B? are true. (d) Both statements, 'A' and 'B' are false.
question_answer13) Assertion (A): When soft iron nails are dipped in a strong solution of copper sulphate, a greenish black solution is formed. Reason (R): Iron replaces copper from copper sulphate solution forming iron sulphate. (a) Both Assertion and Reason are correct and Reason is the correct explanation of Assertion. (b) Both Assertion and Reason are correct but Reason is not the correct explanation of Assertion. (c) Assertion is correct and Reason is incorrect. (d) Assertion is incorrect and Reason is correct
question_answer14) Which of the following reactions are not possible? (a) \[FeS{{O}_{4}}+Cu\xrightarrow{{}}CuS{{O}_{4}}+Fe\] (b) \[2KI+C{{l}_{2}}\xrightarrow{{}}2KCl+{{I}_{2}}\] (c) \[N{{a}_{2}}S{{O}_{4}}+2K\xrightarrow{{}}{{K}_{2}}S{{O}_{4}}+2Na\] (d) \[ZnS{{O}_{4}}+Fe\xrightarrow{{}}FeS{{O}_{4}}+Zn\]
question_answer15) Iodine is used as an antiseptic in the form of ____ solution. (a) Aqueous (b) Alcoholic (c) Homogenous (d) None
question_answer16) Chips packets are filled with an inactive gas, which prevents the spoilage of chips, the gas is..... (a) Oxygen (b) Carbon dioxide (c) Nitrogen (d) Sulphur
question_answer17) Plastic bags (carry bags) are made from polythene which are ____ (a) Semi conductors (b) Conductors (c) Polymers (d) Semi solids
question_answer18) Edible common salt contains (a) Bromine (b) Fluorine (c) Iodine (d) Sulphur
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