Which of the following is NOT a property of bases? | Chemistry Questions & Answers

Q:

In modern periodic table while going from top to bottom in a group ______.

A) size of an atom increases	B) size of an atom decreases
C) ionisation energy of an atom increases	D) size and ionisation energy of an atom increases

Answer & Explanation Answer: D) size and ionisation energy of an atom increases

Explanation:

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Q:

Rupee 5 and 10 coins are now made of

A) Ferritic stainless steel	B) Silver and steel
C) Cupro nickel alloy	D) Copper and brass

Answer & Explanation Answer: C) Cupro nickel alloy

Explanation:

The copper nickel alloys composed of copper with 25% nickel with 0.05-0.4% manganese is commonly used for the manufacture of coins, medals and other semi valuable applications.

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Q:

If the electronic configuration of elements A and B are $1 S^{2}, 2 S^{2} 2 P^{6}, 3 S^{1} and 1 S^{2}, 2 S^{2} 2 P^{6}, 3 S^{2} 3 P^{4}$ respectively, then the formula of the compound formed by the combination of these elements will be:

A) AB3	B) AB2
C) A2B	D) AB

Answer & Explanation Answer: C) A2B

Explanation:

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Q:

Who first discovered the every eighth element had properties similar to that of the first?

A) Newlands	B) Moseley
C) Dobereiner	D) Mendeleev

Answer & Explanation Answer: A) Newlands

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Q:

Burning Magnesium ribbon produces white ash, which dissolves in water to form____.

A) Magnesium Halides	B) Magnesium Oxide
C) Magnesium Hydroxide	D) Magnesium Sulphate

Answer & Explanation Answer: C) Magnesium Hydroxide

Explanation:

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Q:

Fill in the blank with the most appropriate option.

An element attains stability when it achieves ________ state.

A) an only-duplet	B) an only-octet
C) a duplet or octet	D) a heptate

Answer & Explanation Answer: C) a duplet or octet

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Q:

Least distance of distinct vision for normal eye is

A) 15 cm	B) 20 cm
C) 25 cm	D) 30 cm

Answer & Explanation Answer: C) 25 cm

Explanation:

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Q:

Blotting paper absorbs ink due to

A) Coarse nature of paper	B) Osmosis
C) Capillary action	D) Siphoning

A) They react with acids and neutralise them	B) They turn red litmus blue
C) They turn blue litmus red	D) They have bitter taste