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A “good fit” is considered to be one where the cation can touch:  (a) all of its nearest neighbour anions.  (b) most of its …

A solid AB has square planar structure. If the radius of cation A+ is 120pm, calculate the maximum possible value of anion B…

The radius of Ag+ ion is 126pm and of I- ion is 216pm. The coordination number of Ag+ ion is:  (a)2  (b)3  (c)6  (d)8   SOL…

Complete the following analogy: Same molecular formula but different structures:  A:: Non superimposable mirror images: B  (…

Which of the following analogies is correct:  (a)Nitrogen: 1`"s"^{2}` 2`"s"^{2}` 2`"p"^{3}` ::…

Match the following: I II (i)Amino acids (A)protein (ii)Thymine (B)Nucleic acid (iii)Insulin ( C)DNA (iv)phosphodiester li…

Given below are two statements labelled as Assertion (A) and Reason (R)  Assertion (A): Cryoscopic constant depends on natur…

Given below are two statements labelled as Assertion (A) and Reason (R)  Assertion(A): SO2 is reducing while TeO2 is an oxid…

Given below are two statements labelled as Assertion (A) and Reason (R)  Assertion(A):  Molarity of a solution changes with …

Given below are two statements labelled as Assertion (A) and Reason (R)  Assertion (A):  Alkyl halides are insoluble in wate…

Given below are two statements labelled as Assertion (A) and Reason (R)  Assertion (A):  Electron gain enthalpy of oxygen is…

Alkenes decolourise bromine water in presence of CCl4 due to formation of:  (a) allyl bromide  (b) vinyl bromide  (c) bromof…

Identify the secondary alcohols from the following set:  (i)`"CH"_{3}` `"CH"_{2}`CH(OH)`"CH"_{…

Which of the following statements is true:  (a) Ammonia is the weakest reducing agent and the strongest base among Group 15 …

o-hydroxy benzyl alcohol when reacted with PCl3 gives the product as (IUPAC name)  (a) o- hydroxy benzyl chloride  (b) 2- ch…

What would be the reactant and reagent used to obtain 2,. 4-dimethyl pentan-3-oI?  (a) Propanal and propyl magnesium bromide…

Which one of the following are correctly arranged on the basis of the property indicated: (a)`"l"_{2}`< `"…

A unit cell of NaCl has 4 formula units. Its edge length is 0.50 nm. Calculate the density if molar mass of NaCl = 58.5 g/mo…

In lake test for `Al^{3}`+ ions, there is the formation of coloured ‘floating lake’. It is due to: (a)Absorption of litmus b…

In the following reaction,identify A and B (a) A= COOH-`("CH"_{2})_{4}` -COOH, B= OHC-(CHOCO`"CH"_{3})_{…