A uniform electric field and uniform magnetic field are acting along the same direction in a certain region. If an electron is projected in the region such that its velocity is pointed along the direction […]
There are four light-weight-rod samples A,B,C,D separately suspended by threads. A bar magnet is slowly brought near each sample and the following observations are noted (i) A is feebly repelled (ii) B is feebly attracted […]
Which one of the following is present as an active ingredient in bleaching powder for bleaching action
Options
(a) CaOCl₂ (b) Ca(OCl)₂ (c) CaO₂Cl (d) CaCl₂
Correct Answer:
Ca(OCl)₂
Explanation:
No explanation available. […]
Which one of the following is not due to total internal reflection?
Options
(a) working of optical fibre (b) Difference between apparent and real depth of pond (c) Mirage on hot summer days […]
Of the following which one is classified as polyester polymer
Options
(a) Terylene (b) Bakelite (c) Melamine (d) Nylon-66
Correct Answer:
Terylene
Explanation:
Terylene (Dacron) is a polyester polymer because it is made […]
In Dumas’ method of estimation of nitrogen 0.35 g of an organic compound gave 55 mL of nitrogen collected at 300 K temperature and 715 mm pressure. The percentage composition of nitrogen in the compound […]
Which of the following carbonyls will have the strongest C – O bond
Options
(a) Mn(CO)₆⁺ (b) Cr(CO)₆ (c) V(CO)₆⁻ (d) Fe(CO)₅
Correct Answer:
Mn(CO)₆⁺
Explanation:
The presence of positive charge on the […]
Which one of the following statements for the order of a reaction is incorrect
Options
(a) Order can be determined only experimentally (b) Order is not influenced by stoichiometric coefficient of the reactants […]
The van’t Hoff factor i for a compound which undergoes dissociation in one solvent and association in other solvent is respectively
Options
(a) less than one and greater than one (b) less than […]
A radioactive nucleus of mass M emits a photon of frequency v and the nucleus recoils. The recoil energy will be
Options
(a) Mc² – hv (b) h²v² / 2Mc² (c) zero (d) […]
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