2271: The only land-locked country in South-east Asia is
(a) Laos
(b) Thailand
(c) Malaysia
(d) Kampuchea
2272: Consider the following statements regarding Earth Hour :
1. It is an initiative of UNEP and UNESCO.
2. It is a movement in which the participants switch off the lights for one hour on a certain day every year.
3. It is a movement to raise the awareness about the climate change and the need to save the planet.
Which of the statements given above is/are correct?
(a) 1 and 3 only
(b) 2 only
(c) 2 and 3 only
(d) 1, 2 and 3
2273: Which one of the following is the correct sequence of ecosystems in the order of decreasing productivity?
(a) Oceans, lakes, grasslands, mangroves
(b) Mangroves, oceans, grasslands, lakes
(c) Mangroves, grasslands, lakes, oceans
(d) Oceans, mangroves, lakes, grasslands
2274: The resolving power of an electron microscope is much higher than that of an ordinary light microscope because resolving power increases:
(a) If wavelength is short and wavelength of electron beam can be made quite small by accelerating the electrons.
(b) If wavelength is short and light given by electrons has very short wavelength.
(c) If magnification is high and electronic lens provides much higher magnification.
(d) If magnification is high and the electron microscope has a battery of lenses to provide high magnification.
2275: Consider the following Princely States of the British rule in India:
1. Jhansi
2. Sambalpur
3. Satara
The correct chronological order in which ; they were annexed by the British is:
(a) 1-2-3
(b) 1-3-2
(c) 3-2-1
(d) 3-1-2