Boron cannot form which one of the following anion | Chemistry Questions & Answers

Q:

How many moles are there in 140g of Si (atomic mass of silicon is 28)

A) 5	B) 10
C) 28	D) 140

Answer & Explanation Answer: A) 5

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Q:

Positive ions are formed from neutral atoms by loss of

A) neutrons	B) protons
C) nuclear charge	D) electrons

Answer & Explanation Answer: D) electrons

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Q:

The absolute value of charge on electron was determined by

A) J.J.Thomson	B) R.A. Millikan
C) Rutherford	D) Chadwick

Answer & Explanation Answer: B) R.A. Millikan

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Q:

Which one of the following laws explain the formation of carbon monoxide and carbon dioxide from carbon and oxygen

A) Laws of conservation of mass	B) Laws of multiple proportion
C) Laws of reciprocal proportions	D) Law of definite proportions

Answer & Explanation Answer: B) Laws of multiple proportion

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Q:

An element X forms an oxide $XO_{_{3}}$ , what ihe valency of X

A) 1	B) 2
C) 3	D) 6

Answer & Explanation Answer: D) 6

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Q:

Which one of the following elements is the poorest conductor of heat

A) sodium	B) lead
C) zinc	D) mercury

Answer & Explanation Answer: B) lead

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Q:

Which one among the following is the heaviest

A) 1 mole of water molecules	B) 1 mole of ammonia molecules
C) 1 mole of sodium atoms	D) 1 mole of hydrogen molecules

Answer & Explanation Answer: C) 1 mole of sodium atoms

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Q:

How many electrons are there in Na+

A) 1	B) 10
C) 11	D) 12

A) Option 1	B) Option 2
C) Option 3	D) Option 4

Boron cannot form which one of the following anions?

(1) $B O_{2}^{-}$

(2) $B F_{6}^{3 -}$

(3) $B H_{4}^{-}$

(4) $B (O H)_{4}^{-}$

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Boron cannot form which one of the following anions? (1) BO2- (2) BF63- (3) BH4- (4) B(OH)4-

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Boron cannot form which one of the following anions?

(1) $B O_{2}^{-}$

(2) $B F_{6}^{3 -}$

(3) $B H_{4}^{-}$

(4) $B (O H)_{4}^{-}$