GATE CY topic:chemical-sciences PYQs & Answers — Page 8

Questions 71–80 of 650. Imported answers require independent review unless marked reviewed.

Column-I has statements made by Shantha; and, Column-II has responses given by Kanishk.

Column-I: P. This house is in a mess. Q. I am not happy with the marks given to me. R. Politics is a subject I avoid talking about. S. I don’t know what this word means.

Column-II:

Alright, I won’t bring it up during our conversations.

Well, you can easily look it up.

No problem, let me clear it up for you.

Don’t worry, I will take it up with your teacher.

Identify the option that has the correct match between Column-I and Column-II.

Your answerChoose one option.

P – 2; Q – 3; R – 1; S – 4

P – 3; Q – 4; R – 1; S – 2

P – 4; Q – 1; R – 2; S – 3

P – 1; Q – 2; R – 4; S – 3

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Weight of a person can be expressed as a function of their age. The function usually varies from person to person. Suppose this function is identical for two brothers, and it monotonically increases till the age of 50 years and then it monotonically decreases. Let

and

(in years) denote the ages of the brothers and

Which one of the following statements is correct about their age on the day when they attain the same weight?

Your answerChoose one option.

Either

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

A regular dodecagon (12-sided regular polygon) is inscribed in a circle of radius r cm as shown in the figure. The side of the dodecagon is d cm. All the triangles (numbered 1 to 12) in the figure are used to form squares of side r cm and each numbered triangle is used only once to form a square.

The number of squares that can be formed and the number of triangles required to form each square, respectively, are:

Note: The figure shown is representative.

Your answerChoose one option.

3; 4

4; 3

3; 3

3; 2

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

If a real variable

satisfies

, then the value of

is:

Your answerChoose one option.

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

The number of patients per shift (

) consulting Dr. Gita in her past 100 shifts is shown in the figure. If the amount she earns is ₹ 100(

), what is the average amount (in ₹) she has earned per shift in the past 100 shifts?

Note: The figure shown is representative.

Your answerChoose one option.

6,100

6,300

6,000

6,500

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

The phospazene compound that acts as a superbase is

Your answerChoose one option.

Diagram for Chemistry question 11 (figure 2)

Diagram for Chemistry question 11 (figure 3)

Diagram for Chemistry question 11 (figure 4)

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

The reaction for the synthesis of Me₂SiCl₂ through Rochow-Müller process is

Your answerChoose one option.

SiCl₄ + Me₂Zn

Si:Fe (9:1) + 2 MeCl

Si:Cu (9:1) + 2 MeCl

SiCl₄ + 2 MeMgBr

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Upon cooling from room temperature, the magnetic susceptibility of MnO slowly increases until 118 K, and then it decreases. This phenomenon is known as

Your answerChoose one option.

ferromagnetism

paramagnetism

antiferromagnetism

ferrimagnetism

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

An aqueous solution of Co(ClO₄)₂·6H₂O is light pink in color. Addition of conc. HCl results in an intense blue colored solution due to the formation of a new species. The new species among the following is [Given: Atomic number of Co = 27]