1. A
   Both true; II explains I
2. B
   Both true; II does not explain I
3. C
   Statement I true, II false
4. D
   Statement I false, II true

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1. A
   Both true; II explains I
2. B
   Both true; II does not explain I
3. C
   Statement I true, II false
4. D
   Statement I false, II true

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1. A
   Mitochondria, nucleus, chloroplast
2. B
   Mitochondria, Golgi bodies, nucleus
3. C
   Mitochondria, plasma membrane, nucleus
4. D
   Chloroplast, nucleus, ribosomes

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1. A
   protein synthesis
2. B
   lipid synthesis
3. C
   storage of biomolecules
4. D
   detoxification of toxic substances

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1. A
   length of the plant
2. B
   colour of the flower
3. C
   colour of the leaves
4. D
   taste of the fruits

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1. A
   Monera only
2. B
   Protista only
3. C
   Monera and Protista both
4. D
   Protista and Fungi both

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1. A
   Jaundice
2. B
   Tuberculosis
3. C
   Rabies
4. D
   Arthritis

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1. A
   One
2. B
   Two
3. C
   Three
4. D
   Four

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1. A
   $17\cdot5$ u
2. B
   $17$ u
3. C
   $16$ u
4. D
   $16\cdot5$ u

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1. A
   Hydrochloric acid
2. B
   Vinegar
3. C
   Milk
4. D
   Soda water

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1. A
   286 u
2. B
   106 u
3. C
   83 u
4. D
   53 u

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1. A
   $\text{C(s)} + \text{H}_2\text{O(g)}$
2. B
   $\text{CO(g)} + \text{H}_2\text{O(g)}$
3. C
   $\text{CO(g)} + \text{H}_2\text{(g)}$
4. D
   $\text{NO}_2\text{(g)} + \text{H}_2\text{(g)}$

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1. A
   less than 20 Hz
2. B
   between 20 Hz and 2 kHz
3. C
   between 2 kHz and 20 kHz
4. D
   greater than 20 kHz

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1. A
   depends upon the current in the wire
2. B
   depends upon the radius of the wire
3. C
   depends upon the temperature of the surroundings
4. D
   None of the above

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1. A
   $P' = P$
2. B
   $P' = 2P$
3. C
   $P' = P/2$
4. D
   $P' = P/4$

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1. A
   $1\text{ nm} = 10^{-1}\text{ Å}$
2. B
   $1\text{ nm} = 10\text{ Å}$
3. C
   $1\text{ nm} = 1\text{ Å}$
4. D
   $1\text{ nm} = 10^{-2}\text{ Å}$

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1. A
   Light Emitting Diode
2. B
   Light Emitting Device
3. C
   Light Enhancing Device
4. D
   Light Enhancing Diode

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1. A
   $1\cdot6 \times 10^{-19}$ J
2. B
   $1\cdot6 \times 10^{-16}$ J
3. C
   $1 \times 10^{-19}$ J
4. D
   $1 \times 10^{-16}$ J

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1. A
   3–2–1–4
2. B
   2–1–4–3
3. C
   1–4–3–2
4. D
   4–3–2–1

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1. A
   Bef
2. B
   Bils
3. C
   Peh
4. D
   Chars

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1. A
   1–2–3–4
2. B
   2–4–3–1
3. C
   2–3–4–1
4. D
   3–1–2–4

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