NEET Test 76...

In the electrolytic method of obtaining aluminium from purified bauxite, cryolite is added to the charge in order to

One Faraday of electricity is passed through molten Al₂O₃ aqueous solution of CuSO₄ and molten NaCl taken in three different electrolytic cells connected in series. The mole ratio of Al,Cu and Na deposited at the respective cathode is:

Which of the following is an endogenous dormancy?

In an LCR circuit capacitance is changed from C to 2C. For the resonant frequency to remain unchanged, the inductance should be changed from L to:

Darwin's Natural Selection is based on:

For the estimation of nitrogen, 1.4g of an organic compound was digested by the Kjeldahl method, and the evolved ammonia was absorbed in 60 mL of M/10 sulphuric acid. The unreacted acid required 20ml of M/10 sodium hydroxide for complete neutralisation. The percentage of nitrogen in the compound is:

Two different metals are joined end to end. One end is kept at constant temperature and the other end is heated to a very high temperature. The high depicting the thermo emf is

The figure below shows a network of eight resistors numbered 1 to 8 each equal to 2Ω, connected to a 3V battery of negligible internal resistance. The current I in the circuit is:

For ovulation in reflex ovulators:

Two different first order reactions have rate constants k₁ and k₂ at T₁(k₁>k₂). If temperature is increased from T₁ to T₂, then new constants become k₃ and k₄ respectively. Which among the following relations is correct?