Only statement 3 is correct.

Article 63 of the Constitution states that “there shall be a Vice-President of India”. Under Article 64, the VicePresident “shall be ex officio Chairman of the Council of the States” (Rajya Sabha).

During this period, the Vice-President shall “have all the powers and immunities of the President and be entitled
to… (the) emoluments, allowances and privileges” that are due to the President. The office of the Vice-President of India is the second-highest constitutional office after that of the President, and ranks second in the order of precedence.
Article 66 lays down the process of the election of the Vice-President.

It says the Vice-President “shall be elected by the members of an electoral college consisting of the members of both Houses of Parliament in accordance with the system of proportional representation by means of the single transferable vote and the voting at such election shall be by secret ballot”.

Statement 1 is incorrect.

ISRO is establishing a second spaceport in Kulasekarapattinam, Tamil Nadu, dedicated to Small Satellite Launch Vehicles (SSLVs) developed by the private sector.

The SSLV is a cost-effective, flexible launch vehicle capable of deploying around 500kg satellites in a 500-km orbit.

Kulasekharapatnam is a town in the Thoothukudi district of Tamil Nadu. It was an ancient port dating to the 1st century AD and was contemporaneous to the existence of Kollam, Cheran, and Pandyan ports.

https://www.thehindu.com/sci-tech/science/second-spaceport-of-isro-to-be-set-up-at-kulasekarapattinam-in-tamil-nadu/article67403573.ece

Only Statement 2 is correct.

Seafloor spreading occurs along mid-ocean ridges—large mountain ranges rising from the ocean floor. The Mid-Atlantic Ridge, for instance, separates the North American plate from the Eurasian plate, and the South American plate from the African plate.

The East Pacific Rise is a mid-ocean ridge that runs through the eastern Pacific Ocean and separates the Pacific plate from the North American plate, the Cocos plate, the Nazca plate, and the Antarctic plate.

The Southeast Indian Ridge marks where the southern Indo-Australian plate forms a divergent boundary with the Antarctic plate.

All the three pairs are correct.

Humidity is the amount of moisture in the air around us, and there are three ways to track it. The most common of them is absolute humidity: the mass of water vapour in a given volume of the air and water vapour mixture, expressed as kg/m3. The second is specific humidity, equal to the mass of the moisture divided by the mass of air. It is expressed as a dimensionless number (but sometimes also as grams per kilogram, among other similar units.)

The third way is relative humidity: it is important because it factors in the amount of vapour that air can hold at different temperatures. 

Statement 1 and Statement 2 are not possible because these are motions that censure the government, and Rajya Sabha does not enjoy this power.
A no-confidence motion is a parliamentary motion which is moved in the Lok Sabha against the entire council of ministers, stating that they are no longer deemed fit to hold positions of responsibility due to their inadequacy in some respect or their failure to carry out their obligations.