Hardest compound of boron is
Hardest compound of boron is
Options
(a) Magnesium boride (b) aluminium boride (c) boron nitride (d) boron carbide
Correct Answer:
boron carbide
Explanation:
Boron carbide is written as B₃C.It is produced by reducing […]
AIIMS2001
If 0.189g of chlorine containing organic compound gave 0.287g of silver chloride
If 0.189 g of chlorine containing organic compound gave 0.287 g of silver chloride then the percentage of chlorine in the organic compound is
Options
(a) 35.47 (b) 35.57 (c) 37.57 (d) 45.37
Which of the following is always feasible
Which of the following is always feasible
Options
(a) ΔH = TΔS (b) ΔH (+ve),TΔS(-ve) and ΔH>TΔS (c) ΔH(-ve),TΔS(+ve) and ΔH< TΔS (d) ΔH(-ve), TΔS(-ve) and ΔH>TΔS
Correct Answer:
ΔH(-ve),TΔS(+ve) and ΔH< TΔS […]
The IUPAC name of the compound having the formula CCl₃CH₂CHO is
The IUPAC name of the compound having the formula CCl₃CH₂CHO is
Options
(a) 2,2,2-trichloropropanal (b) 1,1,1-trichloropropanal (c) 3,3,3-trichloropropanal (d) 1,2,1-dichloromethanal
Correct Answer:
3,3,3-trichloropropanal
Explanation:
No explanation available. Be the first to write the […]
Which one forms KHX₂ type compound
Which one forms KHX₂ type compound
Options
(a) HF (b) HCl (c) HI (d) HBr
Correct Answer:
HF
Explanation:
No explanation available. Be the first to write the explanation for this question by […]
Genetic drift operates only in
Genetic drift operates only in
Options
(a) island population (b) smaller population (c) larger population (d) mendelian population
Correct Answer:
smaller population
Explanation:
No explanation available. Be the first to write the explanation […]
Classical experiment to prove essentially of CO₂ for photosynthesis was given by
Classical experiment to prove essentially of CO₂ for photosynthesis was given by
Options
(a) Arnon (b) Von Moll (c) Calvin et al (d) Hill
Correct Answer:
Calvin et al
Explanation:
No explanation available. […]
The tension in a piano wire is 10 N. What should be the tension in the wire to produce
The tension in a piano wire is 10 N. What should be the tension in the wire to produce a note of double the frequency?
Options
(a) 5 N (b) 20 N (c) […]
The dual nature of light is exhibited by
The dual nature of light is exhibited by
Options
(a) Photoelectric effect (b) Refraction and interference (c) Diffraction and reflection (d) Diffraction and photoelectric effect
Correct Answer:
Diffraction and photoelectric effect
Explanation:
Diffraction exhibits […]
In a circuit, the current lags behind the voltage by a phase difference of π/2.
In a circuit, the current lags behind the voltage by a phase difference of π/2. The circuit contains which of the following?
Options
(a) Only L (b) Only C (c) Only R (d) […]