Question 1

Cranberry glass is made by adding ........

Accepted Answer

Gold

Answer

Cobalt

Answer

Mnaganese

Answer

Chromium

Question 2

What is exactly the pH value of distilled water?

Accepted Answer

It depends on temperature

Answer

6.6

Answer

7

Answer

7.5

Question 3

Where does water boil at the temperature 37 °C (98.6 °F)?

Accepted Answer

at the Armstrong's line

Answer

in a microwave oven

Answer

at the Kármán line

Answer

at Mount Everest

Question 4

Methanol is highly poisonous. Comparing to ethanol, is it more or less sedative?

Accepted Answer

less sedative

Answer

more sedative

Answer

that depends on the temperature

Answer

the same

Question 5

What is the third by volume, after nitrogen and oxygen, component of dry air?

Accepted Answer

Argon

Answer

Ozone

Answer

Carbondioxide

Answer

Methane

Question 6

At what temperature does the water have the highest density?

Accepted Answer

4°C (39.2°F)

Answer

100°C (212°F)

Answer

0°C (32°F)

Answer

-273°C (-459.4°F)

Question 7

Which compound gives photochemical smog a brownish color?

Accepted Answer

$NO_2$

Answer

$N_2O_4$

Answer

$N_2O_3$

Answer

NO

Question 8

Which acid listed on the right cannot be obtained by adding water to the substance on the left?

Accepted Answer

$TeO_2$ - tellurous acid

Answer

$SeO_2$  selenous acid

Answer

$H_2S_2O_7$ - sulfuric acid

Answer

$SO_2$ - sulfurous acid

Question 9

How many faradays are required to reduce 1.00 g of aluminum(III) to the aluminum metal?

Accepted Answer

0.111

Answer

1.00

Answer

1.11

Answer

3.00

Question 10

When $U^{235}$  is bombarded with one neutron, fission occurs and the products are three neutrons, $Kr^{94}$, and _____ .

Accepted Answer

$Ba^{139}$

Answer

$Xe^{139}$

Answer

$Ba^{141}$

Answer

$Ce^{139}$

Question 11

Which of these isoelectronic species has the smallest radius?

Accepted Answer

$Sr^{2+}$

Answer

$Rb^+$

Answer

$Se^{2-}$

Answer

$Br^-$

Question 12

The nitrate of which of the following cations would exhibit paramagnetism to the GREATEST extent?

Accepted Answer

$Fe^{3+}$

Answer

$Mn^{3+}$

Answer

$Cr^{3+}$

Answer

$Co^{3+}$

Question 13

What type of interparticle forces holds liquid $N_2$ together?

Accepted Answer

London forces

Answer

covalent bonding

Answer

dipole-dipole interaction

Answer

hydrogen bonding

Question 14

Water-based liquids can be described as acidic, neutral, or basic, with respect to pH. Which of these describes milk?

Accepted Answer

Slightly acidic

Answer

Slightly alkaline

Answer

Neutral

Answer

Milk does not have pH

Question 15

DNA codes for proteins, which are the building blocks of organisms. What is the most abundant protein in the human body?

Accepted Answer

Collagen

Answer

Keratin

Answer

Tubulin

Answer

Albumin

Question 16

From which amino acid is nitrous oxide generated?

Accepted Answer

arginine

Answer

glycine

Answer

lysine

Answer

aspartic acid

Question 17

Which one of the following violates the octet rule?

Accepted Answer

$AsF_5$

Answer

$CBr_4$

Answer

$NF_3$

Answer

$PCl_3$

Question 18

2,4-D(2,4-dichlorophenoxyethanoic acid), which is sold as a weed killer of the broad-leaved weeds is a synthetic version of

Accepted Answer

Auxin Hormone

Answer

Cytokinin Hormone

Answer

Xylitol

Answer

None of them

Question 19

Which metal does not liberate $H_2$ from dilute aqueous hydrochloric acid at 298 K?

Accepted Answer

Cu

Answer

Al

Answer

Mg

Answer

Zn

Question 20

Which of the following molecules possesses a dipole moment?

Accepted Answer

$PH_3$

Answer

$B_2H_6$

Answer

$SiH_4﻿$

Answer

$H_2$

Question 21

Which of the following amino acids is achiral?

Accepted Answer

glycine (Gly)

Answer

histidine (His)

Answer

arginine (Arg)

Answer

cysteine (Cys)

Question 22

Which of the following is not involved in electron transfer?

Accepted Answer

Carbonic anhydrase

Answer

rubredoxin

Answer

cytochrome b

Answer

Rieske protein

Question 23

Graphene is a:

Accepted Answer

gapless-band semiconductor

Answer

not a semiconductor but behaves like graphite

Answer

a narrow bandgap semiconductor

Answer

wide band-gap semiconductor

Question 24

Examples of superconducting materials with Tc > 35 K include all but one of the following. Which is the odd one out?

Accepted Answer

NbTi

Answer

$YBa_2Cu_3O_7$

Answer

$MgB_2$

Answer

$Cs_3C_{60}$

Question 25

The following statements are about catalytic converters. Which one is incorrect?

Accepted Answer

Rh catalyses the oxidation of NO

Answer

Permissible emission gases are $CO_2$, $N_2$ and $H_2O$

Answer

The precious metals Rh, Pt and Pd are used in 3-way converters

Answer

$Ce_2O_3$/$CeO_2$ is an "$O_2$ storage" additive

Question 26

A key feature of the Fischer-Tropsch process is:

Accepted Answer

hydrocarbon formation

Answer

alkene polymerization

Answer

alkene hydrogenation

Answer

hydroformylation

Question 27

The oxidation of $SO_2$ to $SO_3$:

Accepted Answer

is thermodynamically favourable, but is slow under ambient conditions

Answer

is thermodynamically unfavourable under ambient conditions

Answer

is explosive under ambient conditions, and the reaction must be controlled on an industrial scale

Answer

has a low activiation energy under ambient conditions

Question 28

In addition to uranium, which other actinoid occurs naturally in significant amounts?

Accepted Answer

Thorium

Answer

Protactinium

Answer

Plutonium

Answer

Actinium

Question 29

Which is the most common oxidation state for thorium in its compounds?

Accepted Answer

+4

Answer

+5

Answer

+6

Answer

+3

Question 30

The mineral source of barium is barytes which is:

Accepted Answer

$BaSO_4$

Answer

$Ba(NO_3)_2$

Answer

BaO

Answer

$BaCl_2$

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