CHEMICAL SCIENCE PART A ( DECEMBER 2019) 2019

1

PYP

CHEMICAL SCIENCE PART A ( DECEMBER 2019) 2019

The trends of two quantities over five year are shown in the graph. Which of the following are valid inferences?
A. The mean values of the quantities are nearly equal
B. The variation in the two quantities are nearly equal
C. Quantity 1 varies less over the given period as compared to Quantity 2

A

Only (A) is true

B

Only (B) is true

C

(A) and (C) are true

D

(A) and (B) are true

2

PYP

CHEMICAL SCIENCE PART A ( DECEMBER 2019) 2019

The difference, the sum and the product of two integers are in the proportion 1:3:10. The two integers are:

A

2025-03-09 13:30:00

B

2025-02-05 13:30:00

C

2025-05-10 12:30:00

D

2025-03-10 12:30:00

3

PYP

CHEMICAL SCIENCE PART A ( DECEMBER 2019) 2019

Which among the following diagrams can represent the relationships between house, offices and building?

A

B

C

D

4

PYP

CHEMICAL SCIENCE PART A ( DECEMBER 2019) 2019

A move of a coin is defined as crossing any number of points in a straight line on the 4 × 4 (horizontally, vertically or diagonally). What is the least number of moves in which a coin, starting from the indicated position, can cover all nine points within the marked square?

A

Four

B

six

C

seven

D

five

5

PYP

CHEMICAL SCIENCE PART A ( DECEMBER 2019) 2019

The length of a rod is measured repeatedly by two persons. Person A reports the length to be 1002 ± 1 cm while person B reports the length to be 1001 ± 2 cm. It is known from a more reliable method that the length is 1000.1 ± 0.5 cm. Which one of the following statements is correct?

A

Measurements made by B are less accurate, but more precise, compared to those by A.

B

Measurements made by A are less accurate, but more precise, compared to those by B.

C

Measurements made by A are more precise and more accurate, compared to those by B.

D

Measurements made by B are more precise and more accurate, compared to those by A.