How many unpaired electrons are present in ground state for Fe²⁺(Z=26)
Options
(a) 6 (b) 2 (c) 8 (d) 4
Correct Answer:
4
Explanation:
No explanation available. Be the first to write the […]
Which of the following is obtained,when formaldehyde reacts with ammonia
Options
(a) Formaldehyde ammonia (b) Formalin (c) Hexamethylene tetramine (d) Formamide
Correct Answer:
Hexamethylene tetramine
Explanation:
No explanation available. Be the first to […]
How many electrons in an atom with atomic number 105 can have (n + l) = 8
Options
(a) 30 (b) 17 (c) 15 (d) unpredictable
Correct Answer:
17
Explanation:
No explanation available. […]
Borax is used as a cleansing agent because on dissolving in water it gives
Options
(a) alkaline solution (b) acidic solution (c) bleaching solution (d) basic solution
Correct Answer:
alkaline solution
Explanation:
No […]
The calorific value of fats,carbohydrates and proteins is in the order of
Options
(a) proteins > carbohydrates > fats (b) fats > proteins > carbohydrates (c) fats > carbohydrates > proteins (d) carbohydrates […]
The two ice cubes kept pressed against each other, stick to each other due to
Options
(a) intermolecular forces (b) hydrogen bonding (c) van der waal’s forces (d) none of these
Correct Answer: […]
100 cm of a given sample of H₂O₂ gives 1000 cm³ of O₂ at STP. The given sample is
Options
(a) 10% H₂O₂ (b) 90% H₂O₂ (c) 10 volume H₂O₂ (d) 100 volume […]
Which one of the following compounds on nitration easily produces nitro derivative
Options
(a) C₆H₆ (b) C₆H₅NO₂ (c) C₆H₅CH₃ (d) C₆H₅OCH₃
Correct Answer:
C₆H₅OCH₃
Explanation:
No explanation available. Be the first to write […]
certain crystals produce electric signals on application of pressur.This phenomenon is called
Options
(a) pyroelecricity (b) ferroelectricity (c) piezoelectricity (d) ferrielectricity
Correct Answer:
piezoelectricity
Explanation:
No explanation available. Be the first to write […]
A gas decolourised by KMnO₄ solution but gives no precipitate with ammoniacal cuprous chloride is
Options
(a) ethane (b) methane (c) ethen (d) acetylene
Correct Answer:
acetylene
Explanation:
No explanation available. Be the […]
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