The strongest base among the following is:

1. KOH
2. LiOH
3. RbOH
4. NaOH
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Answer: C
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Which one is used by mountaineers:

1. KO₂
2. Na₂O
3. CaO
4. MgO
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Answer: A
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Which one of the following is formed when lithium is heated in air:

1. Both Li₂O and Li₃N
2. Only Li₂O
3. Both LiO₂ and Li₃N
4. Only Li₃N
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Answer: A
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The chemical composition of asbestos is:

1. Ca.Mg₃ (SiO₃)₄
2. H₂Mg₃ (SiO₃)₄ H₂O
3. MgCO₃ . CaCO₃
4. KCl . MgCl . 6H₂O
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Answer: A
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In the reaction Be + 2NaOH → X + H₂, x is:

1. BeO
2. Be (OH)₂
3. Na₂ BeO₂
4. None
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Answer: C
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________ formula of cryolite:

1. Al₂O₃ . 2H₂O
2. Al₂F₂SiO₂
3. Na₃Al F₆
4. H₃BO₃
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Answer: C
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Borax occurs as a natural deposit called:

1. Tincal
2. Dolomite
3. Epsom
4. Cryolite
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Answer: A
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Aluminum dissolves in:

1. Bases
2. Acids
3. Both a & b
4. None
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Answer: C
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When a hot solution of boric acid is heated with proper amount of soda ash _____ is formed:

1. Asbestos
2. Borax
3. Alum
4. Colemanate
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Answer: B
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Which one has highest density:

1. Su
2. C
3. Pb
4. Si
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Answer: C
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