HSSC TGT Science Exam

11. What does Electrolysis of aq. NaCl produce

(1) Acidity
(2) Alkalinity
(3) Both A & B
(4) None of these

Correct Answer: (2) Alkalinity

Solution:

Electrolysis of NaCl produces Alkalinity.

12. Which of the following contain both ionic & covalent bond

(1) NaOH
(2) NaCl
(3) C₂H₅Cl
(4) CO₂

Correct Answer: (1) NaOH

Solution:NaOH have both Ionic & covalent bond.

13. A can do a work in 6 days. B takes 12 days. It takes as long as A & B would to working together. In how many days A & B complete work together?

(1) 4 days
(2) 3 days
(3) 8 days
(4) None of these

Correct Answer: (2) 3 days

Solution:A takes = 6 day

B B takes = 12 day

Total work (A and B LCM) = 12

Efficiency A = $1212=2\frac{12}{12} = 2$

Efficiency B = $126=1\frac{12}{6} = 1$

∴ Time by C = $122+1=4\frac{12}{2 + 1} = 4$ days

Efficiency C = $124=3\frac{12}{4} = 3$

Time taken by B & C together

= $efficiency=124=3\frac{\text{Total work}}{\text{Total efficiency}} = \frac{12}{4} = 3$ days

14. A can copy 75 pages in 25 hrs. A & B together can copy 135 pages in 27 hrs. In how much time can B copy 42 pages?

(1) 18 hours
(2) 23 hours
(3) 21 hours
(4) 48 hours

Correct Answer: (3) 21 hours

Solution:A copies 25 pages in 25 hrs.

∴ Efficiency of A = $7525=3\frac{75}{25} = 3$

A + B together copy 135 pages in 27 hrs

∴ Efficiency = $13527=5\frac{135}{27} = 5$

$A + B - A = 5 - 3 = 2$

or, A + B = 5
B = 5 - A
B = 2 efficiency

B takes copying 42 pages

$\frac{42}{2} = 21 \text{ hrs}$

15. What is the National Tree of India?

(1) Coconut tree
(2) Sandalwood (Chandan)
(3) Banyan tree
(4) None

Correct Answer: (3) Banyan tree

Solution:Banyan tree (Ficus benghalensis) is the National tree of India. It is also called Kalp Vriksha. It has medicinal value and provides shelter to many birds and animals. It was adopted as the national tree in 1950.

16. How should science be taught to students?

(1) By giving questions to answer
(2) By sharing practical experiments
(3) By teaching in an engaging way
(4) By conducting practicals

Correct Answer: (4) By conducting practicals

Solution:Students should be taught science with practicals and experiments.

17. If two students were quarreling on the playground, you would:

(1) Beat both of them
(2) Threaten and separate them
(3) Find out the cause and punish the one at fault
(4) Leave the place silently

Correct Answer: (3) Find out the cause and punish the one at fault

Solution:It is the responsibility of the teacher to identify the cause first and then give punishment to the culprit.

18. The Arabian Sea and the Gulf of Persia are connected by the:

(1) Palk Strait
(2) Strait of Bab-el-Mandeb
(3) Strait of Hormuz
(4) Strait of Malacca

Correct Answer: (3) Strait of Hormuz

Solution:

The Hormuz Strait connects the Arabian Sea and the Gulf of Persia.

19. The Ramon Magsaysay Award is named after the former president of which country?

(1) Philippines
(2) Thailand
(3) Indonesia
(4) None of these

Correct Answer: (1) Philippines

Solution:

The Ramon Magsaysay Award is named after the President of the Philippines. It was established in 1957.

20. Dissolution of the state legislative assembly before its tenure completion can be initiated by:

(1) The speaker of the assembly
(2) The Chief Minister
(3) The Governor
(4) Two-thirds majority of the state legislative assembly

Correct Answer: (3) The Governor

Solution:

The Governor can dissolve the state legislative assembly with the consent of the Chief Minister before the completion of its tenure.

HSSC TGT Science Exam

11. What does Electrolysis of aq. NaCl produce

12. Which of the following contain both ionic & covalent bond

13. A can do a work in 6 days. B takes 12 days. It takes as long as A & B would to working together. In how many days A & B complete work together?

14. A can copy 75 pages in 25 hrs. A & B together can copy 135 pages in 27 hrs. In how much time can B copy 42 pages?

15. What is the National Tree of India?

16. How should science be taught to students?

17. If two students were quarreling on the playground, you would:

18. The Arabian Sea and the Gulf of Persia are connected by the:

19. The Ramon Magsaysay Award is named after the former president of which country?

20. Dissolution of the state legislative assembly before its tenure completion can be initiated by:

Related Posts