0

Mixed chemistry test

Description: This test is based on certain topics from chemistry which is highly helpful for engineering aspirants.
Number of Questions: 25
Created by:
Tags: Atoms ions gas laws coloured ions sodium zinc lead etc Colligative Properties Colligative Properties and Determination of Molar Mass Rate of a Chemical Reaction Rate Expression and Order of a Reaction Zero and First Order Reaction Integrated Rate Equations Radioactive Isotopes and Their Uses
Attempted 0/25 Correct 0 Score 0

The osmotic pressure of 5% sol of sucrose (M.M = 342) at 150 0 C, is

  1. 5.07 atm

  2. 5.007 atm

  3. 50.07 atm

  4. 500.07 atm


Correct Option: A
Explanation:

The 5 % sol of sucrose means that 100 cm3 of sol contains 5 g of sucrose. Here, WB = 5 g, M= 342 n mol-1, T = 150 + 273 = 423K, V = 0.100L, R = 0.082L atm mol-1K-1$\pi$  = nB/V RT = WBRT/MBRT =  5x0.082x423/342x0.100 = 5.07 atm

In endosmosis, the volume of solution

  1. decreases

  2. increases

  3. remains same

  4. first increases then decreases


Correct Option: B
Explanation:

In endosmosis, the volume of solution increases due to the inflow of the solution.

The reaction 2A $\to$ 2B + C obeys second order rate law. When the partial pressure of A is doubled, the rate would

  1. remain unchanged

  2. get doubled

  3. become four times the original

  4. reduce to half


Correct Option: C
Explanation:

When the partial pressure of A is doubled, its concentration gets doubled. Since rate = k (A)2, so the rate becomes four times the original.

The diazonium salt decomposes as, C6H5N2+Cl- $\to$ C6H5Cl + N2. At 00 C, the evolution of nitrogen becomes two times faster when the initial concentration of the salt doubles. Therefore, it is a

  1. first order reaction

  2. second order reaction

  3. third order reaction

  4. zero order reaction


Correct Option: A
Explanation:

Since the evolution of nitrogen becomes two times faster when the initial concentration of the salt is doubled, so it is a first order reaction.

Which radioactive isotope being potentially used in gamma radiography?

  1. Zinc-65

  2. Ytterbium-169

  3. Thallium-204

  4. Iridium-192


Correct Option: B
Explanation:

It is an isotope of Ytterbium being potentially used in gamma radiography and non-destructive testing.

Which radioactive isotope is being potentially used in colon transit studies?

  1. Thallium-201

  2. Rubidium-82

  3. Indium-111

  4. Gallium-67


Correct Option: C
Explanation:

It is an isotope of Indium being potentially used in brain studies, infection and colon transit studies.

Which among the following acids is not used in the production of cosmetics?

  1. Arachidic acid

  2. Stearic acid

  3. Palmitic acid

  4. Myristic acid


Correct Option: D
Explanation:

It is a saturated fatty acid being potentially used in topical medicinal build ups where absorption through the skin is desired.

Which among the following acids is found in the milk of mammals?

  1. Tridecylic acid

  2. Lauric acid

  3. Caprylic acid

  4. Valeric acid


Correct Option: C
Explanation:

It the eight-carbon saturated fatty acid. It is found commonly in the milk of many mammals.

The carboxylic acid present in vomit is

  1. butyric acid

  2. propanoic acid

  3. acetic acid

  4. formic acid


Correct Option: A
Explanation:

It is a carboxylic acid which found in butter, parmesan cheese, and vomit.

Which of the following are the nonclassic eicosanoids?

  1. Isofurans

  2. Neurofurans

  3. Isoprostanes

  4. Prostaglandin


Correct Option: A
Explanation:

These are nonclassic eicosanoids produced from non-enzymatically by free radical intervened peroxidation of arachidonic acid.

The acid acting as a precursor to bio-diesel is

  1. oleic acid

  2. elaidic acid

  3. erucic acid

  4. nervonic acid


Correct Option: C
Explanation:

It is a monounsaturated omega-9 fatty acid. It acts as a precursor to bio-diesel.

The acid discharged by cockroaches after death to prevent other cockroaches from entering that area is

  1. mead acid

  2. linoleic acid

  3. $\alpha$-linolenic acid

  4. arachidonic acid


Correct Option: B
Explanation:

It is an unsaturated n-6 fatty acid. It is discharged by cockroaches after death to prevent other cockroaches from entering that area.

Which of the following acids is the main additive in cigarettes?

  1. Caproic acid

  2. Nonanoic acid

  3. Heptanoic acid

  4. Decanoic acid


Correct Option: C
Explanation:

It is an organic compound with rancid odour. It is the main additive in cigarettes.

Which among the following fatty acids does not occur in any natural animal or vegetable fat?

  1. Pentadecanoic acid

  2. Margaric acid

  3. Nonadecyclic acid

  4. Behenic acid


Correct Option: B
Explanation:

It is a saturated fatty acid. It is the only fatty acid which does not occur in any natural animal or vegetable fat.

Which acid is present in Chinese wolfberries?

  1. Lignoceric acid

  2. Cerotic acid

  3. Montanic acid

  4. Psyllic acid


Correct Option: D
Explanation:

Psyllic acid is a saturated fatty acid. It occurs in Chinese wolfberries.

The fats having one double bond in the fatty acid chain are termed as

  1. monounsaturated fats

  2. saturated fat

  3. trans-fat

  4. unsaturated fat


Correct Option: A
Explanation:

These are fatty acids having one double bond in the fatty acid chain and all of the remainder of the carbon atoms in the chain are single-bonded.

Which of the following compounds is the main constituent of Dettol?

  1. Chloroxylenol

  2. Hexachlorophene

  3. Thymol

  4. 2,4-dichlorobenzyl alcohol


Correct Option: A
Explanation:

It is the main constituent of Dettol, which is a household disinfectant and antiseptic.

Which among the following is not used as a disinfectant?

  1. Dequadin

  2. Nitrofurazone

  3. Hexachlorophene

  4. Cetrimonium


Correct Option: B
Explanation:

It is a bactericidal chemical being chiefly consumed as an antibiotic most commonly in the form of ointments.

The aquariums are disinfected by

  1. potassium peroxymonosulphate

  2. potassium permanganate

  3. peracetic acid

  4. ozone


Correct Option: B
Explanation:

It is utilised to disinfect aquariums and is also mainly employed in it. It is used to disinfect aquariums and is also widely used in public swimming pools to disinfect people's feet before using the pool.

Which among the following is used as a medical sterilant in hospitals?

  1. Sodium hypochlorite

  2. Chloramine

  3. Hydrogen peroxide

  4. Hydrogen peroxide vapour


Correct Option: D
Explanation:

It is generally used as a medical sterilant.

The ratio of the actual output and the potential output of a power plant is known as

  1. availability factor

  2. load factor

  3. spark spread

  4. dark spread


Correct Option: B
Explanation:

The load factor of a power plant is defined as the ratio of the actual output of a power plant over a period of time and its potential output if it had operated at full nameplate capacity the entire time.

Which of the following reactors does not load follow?

  1. Gas turbine power plants

  2. Hydroelectric power plants

  3. Boiling water reactors

  4. Pressurized water reactors


Correct Option: D
Explanation:

These reactors use a chemical shim in the moderator to control power level, and so normally do not load follow.

A neutron-absorbing material is used for making

  1. control rods

  2. moderator

  3. containment

  4. pressure vessel


Correct Option: A
Explanation:

These are made with neutron-absorbing materials such as cadmium, hafnium or boron, and are inserted or withdrawn from the core to control the rate of reaction or to halt it.

The reactor producing the electricity by slowing down an ion beam of fission is

  1. supercritical water reactor

  2. molten salt reactor

  3. sodium-cooled fast reactor

  4. fission fragment reactor


Correct Option: D
Explanation:

This nuclear reactor produces electricity by slowing down an ion beam of fission side products instead of using nuclear reactions to generate heat.

Which among the following atoms is formed by the beta decay of carbon-14 ?

  1. Oxygen-18

  2. Beryllium-10

  3. Boron-14

  4. Nitrogen-14


Correct Option: D
Explanation:

This answer is correct. A neutron was changed to a proton thereby increasing the atomic number of the element by one. The identity of the element with an atomic number 7 is nitrogen.

- Hide questions