106
Q:

Boron cannot form which one of the following anions?

(1) BO2-

(2) BF63-

(3) BH4-

(4) B(OH)4-

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

Answer:   B) Option 2



Explanation:

Due to absence of low lying vacant d orbital in B, sp3d2hybridization is not possible hence BF63-will not formed. 

Subject: Chemistry
Exam Prep: AIEEE
Q:

The compound used in prickly-­heat powder to prevent excessive sweating is

A) Boric acid B) Phosphoric acid
C) Carbonic acid D) Sulphonic acid
 
Answer & Explanation Answer: A) Boric acid

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0 1399
Q:

The elements known as primary nutrients for plants

A) Nitrogen, Phosphorus and Potassium B) Nitrogen, Oxygen and Silicon
C) Potassium, Boron and Nitrogen D) Nitrogen, Phosphorus and Iron
 
Answer & Explanation Answer: A) Nitrogen, Phosphorus and Potassium

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1 961
Q:

Which among the following will be a negative ion?

A) If it has more electrons than protons B) If it has more electrons than neutrons
C) If it has more protons than electrons D) If it has more protons than neutrons
 
Answer & Explanation Answer: A) If it has more electrons than protons

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1 1557
Q:

Isobars have _______.

A) Same mass numbers but different atomic numbers B) Different mass numbers but same atomic numbers
C) Same mass and atomic numbers D) Different mass and atomic numbers
 
Answer & Explanation Answer: A) Same mass numbers but different atomic numbers

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1 669
Q:

Who invented the modern periodic table?

A) Faraday B) Mendeleev
C) Newton D) Bohr
 
Answer & Explanation Answer: B) Mendeleev

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0 833
Q:

The absolute zero is a temperature at which _______

A) molecular motion in a gas would cease B) water freezes
C) all gases become liquid D) all gases become solid
 
Answer & Explanation Answer: A) molecular motion in a gas would cease

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1 1091
Q:

Which of the following is not a nitrogenous fertiliser?

A) Ammonium sulphate B) Urea
C) Ammonium nitrate D) Superphospohate
 
Answer & Explanation Answer: D) Superphospohate

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0 899
Q:

Which one of the following non­metals shows allotropy in the liquid state?

A) Carbon B) Sulphur
C) Phosphorous D) Bromine
 
Answer & Explanation Answer: B) Sulphur

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0 1056