NEET-UG 2020 · Code E1

Identify a molecule which does not exist.

1. AHe2
2. BLi2
3. CC2
4. DO2

Find out the solubility of Ni(OH)2 in 0.1 M NaOH. Given that the ionic product of Ni(OH)2 is 2×10−15.

1. A2×10−13 M
2. B2×10−8 M
3. C1×10−13 M
4. D1×108 M

Identify the correct statements from the following :

1. aCO2(g) is used as refrigerant for ice-cream and frozen food.
2. bThe structure of C60 contains twelve six carbon rings and twenty five carbon rings.
3. cZSM-5, a type of zeolite, is used to convert alcohols into gasoline.
4. dCO is colorless and odourless gas.

Hydrolysis of sucrose is given by the following reaction. Sucrose+H2O ⇌ Glucose+Fructose If the equilibrium constant (Kc) is 2×1013 at 300 K, the value of ∆rGs at the same temperature will be :

1. A−8.314 J mol−1K−1×300 K×ln(2×1013)
2. B8.314 J mol−1K−1×300 K×ln(2×1013)
3. C8.314 J mol−1K−1×300 K×ln(3×1013)
4. D−8.314 J mol−1K−1×300 K×ln(4×1013)

Identify the incorrect match. Name — IUPAC Official Name (a) Unnilunium

1. (i)
   Mendelevium (b) Unniltrium
2. (ii)
   Lawrencium (c) Unnilhexium
3. (iii)
   Seaborgium (d) Unununnium
4. (iv)
   Darmstadtium

Which of the following set of molecules will have zero dipole moment ?

1. AAmmonia, beryllium difluoride, water, 1,4-dichlorobenzene
2. BBoron trifluoride, hydrogen fluoride, carbon dioxide, 1,3-dichlorobenzene
3. CNitrogen trifluoride, beryllium difluoride, water, 1,3-dichlorobenzene
4. DBoron trifluoride, beryllium difluoride, carbon dioxide, 1,4-dichlorobenzene

On electrolysis of dil.sulphuric acid using Platinum (Pt) electrode, the product obtained at anode will be :

1. AHydrogen gas
2. BOxygen gas
3. CH2S gas
4. DSO2 gas

Reaction between acetone and methylmagnesium chloride followed by hydrolysis will give :

1. AIsopropyl alcohol
2. BSec. butyl alcohol
3. CTert. butyl alcohol
4. DIsobutyl alcohol