19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
N₂ is passed through overheated CaC₂. Which of the following options is correct for the product formed? (I) State of hybridization of C is sp. (II) Urea is an intermediate formed during hydrolysis of the above product…
Assertion: HNO₃ is a stronger acid than HNO₂. Reason: In HNO₃ there are two nitrogen to oxygen bonds whereas in HNO₂ there is only one.
Assertion: Although PF₅, PCl₅ and PBr₅ are known, the pentahalides of nitrogen have not been observed. Reason: Phosphorous has a lower electronegativity than nitrogen.
Assertion: O₃ has a fishy smell. Reason: It absorbs red part of the visible light.
Dry Cl₂ reacts with dry SO₂ to form:
When F₂ reacts with hot and conc. alkali, then following will be obtained: (i) OF₂ (ii) O₂ (iii) H₂O (iv) NaF
The oxidation state of xenon atom in XeF₄, HXeO and Na₄XeO₆ are respectively:
Which of the following oxides of chlorine is obtained by passing dry chlorine over silver chlorate at 900C?
Which of the following compounds give NH₃ on heating? (I) NH₄NO₃ (II) NH₄NO₂ (III) (NH₄)₂ Cr₂O₇ (IV)(NH₄)₂CO₃ (V) Mg (NH₄) PO₄
The best reducing agent among the following is
HClO₄ + P₂O₅ → (A) + (B)
The shape of XeO₂F₂ molecule is:
The property of halogens, that indicated incorrect is:
When H₂S gas is passed into aqueous sulphur dioxide
Liquid I₂ Cl₆ has the structure (a)
Pure nitric acid is a colourless liquid, but on exposure to light it turns brownish due to
When iodine is treated with a mixture of NaF, NaBr and NaCl in water, it gives
Na₂SO₃ on being heated with sulphur produces
Phosphorus is obtained by
White phosphorus on reaction with limewater gives calcium salt of an acid (A) along with a gas (X). Which of the following is correct?
White phosphorus reacts with calcium to give a certain compound. This compound on hydrolysis produces
Which is not correct regarding the Holme’s signal?
In the cationic parts of solid N₂O₅ and solid N₂O₄, the bond order of N–O are, respectively,
NH₄NO₂ NH₄NO₂ on heating gives
Which of the following does not have S—S linkage? (a) S O (b) S O (c) S O (d) S O