Which of the following is correct with respect to – I effect of the substituents? (R = alkyl)

• -NH₂ <- OR < - F

• -NR₂ <- OR <-F

• -NR₂ >-OR>-F

• -NH₂>-OR>-F

In which case is a number of molecules of water maximum?

• 18 mL of water

• 0.18 g of water

• 10^-3 mol of water

• 0.00224 L of water vapours at 1 atm and 273K

13.

Among CaH₂, BeH₂, BaH₂, the order of ionic character is

• BeH₂< CaH₂<BaH₂

• CaH₂<BeH₂<BaH₂

• BaH₂<BeH₂<CaH₂

• BeH₂ < BaH₂ < CaH₂

For the redox reaction

$Mn{O}_4^{-} + C_2{O}_4^{-2} + H^{+} \stackrel{ }{\to } M{n}^{2+} + C{O}_2 + H_{2}O$

The correct coefficients of the reactants for the balanced equation are

• $Mn{O}_4^{-}$	$C_2{O}_4^{2-}$	H+
  16	5	2

• MnO4-	C2O42-	H+
  2	5	16

• MnO4-	C2O42-	H+
  5	16	2

• MnO4-	C2O42-	H+
  2	16	5

Which one of the following elements is unable to form $M{F}_6^{-3}$ ion?

• Ga

• Al

• In

• B

Considering the Ellingham diagram, which of the following metals can be used to reduce alumina?

• Fe

• Zn

• Cu

• Mg

Which of the following statements is not true for halogens?

• All form monobasic oxyacids

• All are oxidizing agents

• Chlorine has the highest electron-gain enthalpy

• All but fluorine show positive oxidation states

In the structure of ClF₃, the number of lone pair of electrons on central atom ‘Cl’ is

• One

• Two

• Three

• Four

A mixture of 2.3 g formic acid and 4.5 g oxalic acid is treated with conc. H₂SO₄. The evolved gaseous mixture is passed through KOH pellets. Weight (in gram) of the remaining product at STP will be

• 1.4

• 3.0

• 4.4

• 2.8

Match the metal ions given in Column I with the spin magnetic moments of the ions given in Column II and assign the correct code :

• a	b	c	d
  iv	v	ii	i

• a	b	c	d
  i	ii	iii	iv

• a	b	c	d
  iii	v	i	ii

• a	b	c	d
  iv	i	ii	iii