All Analytical and Logical Reasoning MCQs

Question 1

Experiment: A beaker containing water and ice was kept at room temperature and its temperature was recorded every minute.Observation: The temperature remained at 0°C until all ice melted.Question: What does this show?

Accepted Answer

Latent heat of fusion keeps temperature constant during phase change.

Answer

Ice absorbs no heat from the surroundings.

Answer

Melting lowers temperature further.

Answer

Water is a poor conductor of heat.

Question 2

Experiment: Aluminium foil was added to a solution of dilute sulfuric acid.Observation: Bubbles of gas formed and the foil slowly dissolved.Question: Which gas is being evolved?

Accepted Answer

Hydrogen, due to reaction of metal with acid.

Answer

Oxygen, from aluminum breakdown.

Answer

Nitrogen, from sulfuric acid.

Answer

Carbon dioxide, from aluminum oxide.

Question 3

Experiment: A burning candle was placed in a closed bell jar.Observation: The flame extinguished after some time and condensation appeared inside the jar.Question: What conclusion can be made?

Accepted Answer

Oxygen is necessary for combustion and is used up.

Answer

Carbon dioxide supports combustion.

Answer

Water is released from the wax only due to heat.

Answer

Air becomes flammable over time.

Question 4

Experiment: Dilute nitric acid was added to powdered iron in a beaker.Observation: A brown gas was released, and the solution turned light green.Question: What does this indicate?

Accepted Answer

Iron reacts with nitric acid to form iron nitrate and NO₂.

Answer

Iron gets coated with brown rust.

Answer

Green color is due to iron oxidation into Fe³⁺.

Answer

Gas is hydrogen released during rusting.

Question 5

Experiment: Carbon dioxide was passed through limewater and then in excess.Observation: Limewater turned milky, then became clear again.Question: What does this show?

Accepted Answer

Initially, carbon dioxide reacts with limewater to form insoluble calcium carbonate, which causes the milkiness. When excess CO₂ is added, the calcium carbonate dissolves to form soluble calcium hydrogen carbonate, making the solution clear again.

Answer

Calcium carbonate is a white, insoluble solid that forms when carbon dioxide reacts with limewater, not colored or volatile.

Answer

CO₂ does react with limewater to form calcium carbonate, leading to the initial milkiness observed in the experiment.

Answer

The milkiness observed is due to the formation of calcium carbonate, not related to oxygen content. This option misinterprets the observation.

Question 6

Experiment: Two colorless liquids (ethanol and water) were mixed and the temperature increased.Observation: The beaker felt warm to touch.Question: What kind of process occurred?

Accepted Answer

Exothermic process due to bond formation.

Answer

Endothermic process due to energy absorption.

Answer

Neutralization reaction between acid and base.

Answer

Cooling due to evaporation.

Question 7

Experiment: A litmus paper was dipped into a lemon juice sample.Observation: The blue litmus turned red.Question: What does this confirm?

Accepted Answer

Lemon juice is acidic in nature.

Answer

Lemon juice is neutral.

Answer

It contains basic salts.

Answer

Litmus is unreactive with lemon.

Question 8

Experiment: Dilute sulfuric acid was added to barium chloride solution.Observation: A white insoluble solid formed immediately.Question: What reaction occurred?

Accepted Answer

Formation of barium sulfate as a precipitate.

Answer

Neutralization of acid and base.

Answer

Formation of hydrochloric acid.

Answer

Combustion of sulfur compounds.

Question 9

Experiment: A piece of sodium was dropped in water in a trough.Observation: It moved rapidly, producing fizzing and a colorless gas that burned with a pop.Question: What gas was released?

Accepted Answer

Hydrogen gas from sodium-water reaction.

Answer

Carbon dioxide from water.

Answer

Oxygen from salt decomposition.

Answer

Nitrogen from sodium nitrate.

Question 10

Experiment: Magnesium ribbon was burned in a jar of carbon dioxide.Observation: A white ash was formed and black carbon was deposited.Question: What does this show?

Accepted Answer

Magnesium can reduce CO₂ to carbon.

Answer

CO₂ acts as an oxidizing agent.

Answer

Magnesium evaporates in CO₂.

Answer

Carbon dioxide is neutral gas.

Question 11

Experiment: Concentrated hydrochloric acid was placed in a beaker and a glass rod dipped in ammonia was brought near.Observation: Dense white fumes were observed.Question: What is being formed?

Accepted Answer

Ammonium chloride due to combination of HCl and NH₃.

Answer

Sulfuric acid vapor reacting with water.

Answer

Ammonia decomposing in air.

Answer

Precipitate of hydrogen gas.

Question 12

Experiment: Iron nails were placed in a solution of copper sulfate, and after 30 minutes, they were rinsed and weighed.Observation: Mass increased due to a layer of another metal.Question: What does this confirm?

Accepted Answer

Displacement reaction where iron replaces copper.

Answer

Corrosion by copper ions.

Answer

Coating due to evaporation.

Answer

Precipitation of salt on iron.

Question 13

48 competitors entered the men's 100 metres freestyle event at this year's Muscan Swimming Championships. They were divided randomly into 6 heats, with the fastest 16 qualifying for the semi-finals.These are the results of the 6 heats.From which heat was there only one qualifier for the semi-finals?

Accepted Answer

Heat 5

Answer

Heat 1

Answer

Heat 3

Answer

Heat 6

Question 14

The ingredients on a jar of mincemeat are in order of content by weight and are as follows:Sugar; Apples (26%); Vine fruit (26%); Candied mixed peel (4%); Vegetable suet; Treacle; Acetic Acid: Mixed spices (0.3%); Citric Acid; Antioxidant (Ascorbic Acid).To the nearest 1%, what is the possible range of sugar content?

Accepted Answer

26% to 44%

Answer

26% to 43%

Answer

31% to 43%

Answer

31% to 44%

Question 15

Tom needs to save some money to buy himself a new car. At the start of January there is $400 in his savings account. He is able to add $100 to the account at the end of each month.In April he knows that he will be paid a bonus and have an increase in his salary, so he needs to add $500 to his account at the end of April and then $150 each month of that.Which of the following graphs represents the total money that he will share in his savings account at the end of each month?

Accepted Answer

A

Answer

B

Answer

C

Answer

D

Question 16

A question-master asks each of four contestants up to 15 questions. The process is repeated again for a second round. The 'score' is the number of questions answered correctly. The scores after each round are announced in ascending numerical order.After the first round of a contest the scores were 8, 10, 11, and 14.After the second round the total scores for the contestants were 13, 18, 20, and 24.What was the largest possible score achieved in the second round of this contest?

Accepted Answer

14

Answer

10

Answer

11

Answer

16

Question 17

A rectangular piece of paper is folded in half and then folded in half the other way to produce a rectangle with sides half the lengths of those of the unfolded paper. Three corners of this folded paper are then cut off and the paper unfolded.Which one of the following could not be a representation of the paper when unfolded again?

Accepted Answer

A

Answer

B

Answer

C

Answer

D

Question 18

A display showing the 24-hour time (0000 to 2359) uses some or all of seven lights for each digit as follows:What is the greatest number of lights on at any time?

Accepted Answer

28

Answer

25

Answer

26

Answer

27

Question 19

In her first five weekly shopping trips on Saturdays, Angela spends $14, $7, $14, $7 respectively to ensure that she has enough stock of her new daily vitamin pill to last for the week without spending more than she needs to.Which one of the following would explain this variation?

Accepted Answer

The pills are sold in packets of 5

Answer

The pills are sold in packets of 4

Answer

The pills are sold in packets of 6

Answer

The pills are sold in packets of 7

Question 20

Four members of an online community construct a diagram to show whether they have ever met in real life. Each person is represented by a dot and two dots are jained together with a line if those two people have ever met in real life. The diagram looks like this:Each member of the group then makes a table, showing with a tick when two people have ever met in real life. Shaded cells show people linked to themselves. Which person's table is wrong?

Accepted Answer

C

Answer

A

Answer

B

Answer

D

All Free Analytical and Logical Reasoning MCQs with Answers