A glass of water does not turn into ice as it reaches 0°C. It is because

• water does not solidify at 0%C

• a certain amount of heat must be supplied to the glass of water so as to solidify

• a certain amount of heat must be taken out from the glass of water so as to solidify

• water solidifies at 0 K only

The main power supply in India is at 220 V, whereas that in the US is at 110 V. Which one among the following statements in this regard is correct?

• 110 V is safer but more expensive to maintain

• 110 V is safer and cheaper to maintain

• 110 V leads to lower power loss

• 110 V works better at higher latitudes

The equatorial rain forest is also known as

• Savanna

• Campos

• Selva

• Lanose

Match List-I with List-II

List I (Port)

1. Kandla
2. Kochi
3. Vishakhapatnam
4. Kolkata

List II (Special feature)

1. Deepest land-locked protected port
2. Located at the mouth of the lagoon
3. Tidal port
4. Inland riverine port

• (a) - 3, (b) - 1, (c) - 2, (d) - 4

• (a) - 3, (b) - 2, (c) - 1, (d) - 4

• (a) - 4, (b) - 1, (c) - 2, (d) - 3

• (a) - 4, (b) - 2, (c) - 1, (d) - 3

The Earth's surface receives maximum energy at l2 noon but the maximum temperature never occurs at 12 noon. State which of the following reasons are correct.

1. The transformation of solar energy into heat requires some time.
2. The loss of energy through long-wave radiations from the Earth's surface exceeds the energy received from the Sun at 4:00 p.m.
3. Energy received by the Earth from solar radiations continues to exceed the energy lost by outgoing long-wave radiations from the Earth's surface up to 4:00 pm.

Select the correct answer using the code given below:

• 1 and 2 only

• 2 and 3 only

• 1 and 3 only

• 1, 2 and 3

Certain parts of a plant can be bent easily without breaking. This flexibility in certain parts, like leaf and stem, can be attributed to the abundance of

• parenchyma

• collenchyma

• sclerenchyma

• xylem and phloem

Which of the following is not a micronutrient for a plant?

• Iron

• Magnesium

• Molybdenum

• Manganese

38.

Which of the following statements is/are correct?

1. Ligaments are highly flexible.
2. Ligaments connect muscles and bones.
3. Ligaments contain very little matrix.

Select the correct answer using the code given below:

• 1,2 and 3

• 1 and 3 only

• 2 and 3 only

• 1 only

The cell membrane is selectively permeable because

• it is made up of selected organic molecules

• it does not allow transport of some substances from region of higher concentration to the region of lower concentration

• the movement of organic molecules occurs only at a specific concentration

• it allows the movement of certain molecules in and out of the cell while the movement of other molecules is prevented

The following equation is an example of a redox reaction, in which Cl₂ is the oxidizing agent and FeBr₃ is the reducing agent:

2FeBr₃(aq) + 3Cl₂ (g) = 2FeCl₃(aq) + 3Br₂(1)

Which one among the following statements is incorrect for this redox reaction?

• Oxidizing agents are themselves reduced

• Reducing agents gain or appear to gain electrons

• Reducing agents are themselves oxidized

• Oxidizing agents oxidize other substances.