# Q. In the alumino-thermite process, aluminium acts as

IIT JEEIIT JEE 1983General Principles and Processes of Isolation of Elements

Solution:

## In thermite welding, Al acts as a reducing agent $2Al+Fe_2O_3\rightarrow Al_2O_3+2Fe+Heat$

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## 1. Which of the following solutions will have pH close to 1.0 ?

IIT JEE 1992 Equilibrium

## 2. The most convenient method to protect the bottom of the ship made of iron is

AIPMT 2001 Electrochemistry

## 3. Diethyl ether on heating with conc. HI gives two moles of

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## 4. For a first order reaction, the time taken to reduce the initial concentration by a factor of 1/4 is 20 min. The time required to reduce initial concentration by a factor of 1/16 is

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## 5. Moderate electrical conductivity is shown by

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## 6. Which of the following is considered to be an anticancer species?

AIPMT 2004 Coordination Compounds

## 7. Hydrolysis of one mole of peroxodisulphuric acid produces

IIT JEE 1996 The s-Block Elements

## 8. Acidic hydrogen is present in

IIT JEE 1985 Hydrocarbons

## 9. Rutherford's scattering experiment is related to the size of the

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## 10. Pure water can be obtained from sea water by

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