Question

Q.NO
ANSWER THE FOLLOWING QUESTIONS
MARKS

Part A

1.
What happen to the current in a circuit if it’s resistance is doubled?
1
2.
In order to measure current in a resistance present in a circuit, the ammeter is connected :
In series
In parallel
In series or parallel
None of the above.
1
3.
What would be the electron dot structure of a molecules of sulphur which is made up of eight atoms of sulphur?
1
4.
How would the tendency to gain electrons changes as we go from left to right in a period of periodic table?
1
5.
State one reason for keeping chlorine and bromine in the same group of the periodic table.
1
6.
Name the tissue which transport products of photosynthesis in plants.
1
7.

Why is DNA copying essential part of the process of reproduction?
1
8.
Define heredity.
1

Part B

9.
Explain the nature of the covalent bond using the bond formation in CH3Cl.
2
10.
Nitrogen and phosphorus belong to group 15 of the periodic table. Write the electronic configuration of these two elements . which of these will be more electronegative ? why.
2
11.
How does a solenoid behave like a magnet? Can you determine the north and south poles of a current carrying solenoid with a help of bar magnet? Explain.
2
12.
How can you reduce the problem of waste disposal? Give any two methods.
2
13.
What will happen if we kill all the animals in one trophic level?
2

Part C

14.
Compare and contrast the arrangement of elements in Mendeleev’s periodic table and the modern periodic table.
3
15.
Draw a circuit diagram to show an electric lamp of resistance 30Ω and a resistor of 6Ω connected in series with a battery of 6V. Calculate
Total resistance in the circuit.
Current flowing throught the circuit.
Potential difference separately across the lamp and the resistor.
3
16.
There are two electric bulbs (i) marked 60W, 220V and (ii) marked 100 W, 220V. which one of the two has a higher resistance?
3
17.
Differentiate between artery and veins.
3

Part D

18.
Explain various modes of asexual reproduction in organisms with suitable diagram.
5
19.
(i) How current in different resistors vary if they are connected in parallel?
(ii) What is the voltage across each resistor when connected in parallel?
(iii) when a 12V battery is connected across an unknown resistor, a current of 2.5 mA flows in the circuit. Calculate the value of the resistance of the resistor.
5​

Answer 1

Answer:

1. ABE BACHE KA JAAN LEGA KYA BRO
2. ACHA SUN TERE LIYE EAK SHYARI

Explanation:

HAAR DARD KA ILAAJ NAHI DAWA KHANE ME

KUCH DARD CHALE JATA HEI DOSTO KE SATH MUSKURANE ME.

Answer 2

Answer:

Question 3 ka h

1. If resistance is doubled then current becomes half

2. Series

4. As we left to right tendency of gaining electron becomes more

5. Because they have same number of shell

6. Phloem

7. So that variation could not become vast. As a big variation may lead to unfavorable conditions for the new projeni this led to death

8. Passing or capable of passing naturaly from parents to offspring through genes

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