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Which of the following has the lowest me...

Which of the following has the lowest melting point ?

A

Na

B

Cs

C

Rb

D

K

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UNITED BOOK HOUSE-MODEL QUESTION PAPER 7-EXERCISE
  1. An ideal gas is allowed to expand under adiabatic conditions what is z...

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  2. Consider the reaction A(g) + B (g) overset(rightarrow)(leftarrow) C (g...

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  3. Which of the following has the lowest melting point ?

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  4. Which of the following is least thermally statble?

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  5. In the Lassaigne’s test for the detection of sulphur, the purple colou...

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  6. In the compound overset1CH2=overet2CH—overset3CH2—overset4CH2— overset...

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  7. Which of the following gives on ozonolysis both aldehydes and ketones?

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  8. Benzene reacts with CH3COCI in, the presence of anhydrous AICI3 to for...

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  9. Which one causes Minamata

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  10. Calculate the number of atoms in 56u of He atom (Atomic mass of He = 4...

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  11. 1 amu = g.

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  12. Identify the s-block and p-block elements among the following elements...

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  13. Write the IUPAC name and symbol for the element with atomic number 119...

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  14. Classify the following system into open, closed or isolated : Hot tea ...

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  15. Identify 'X' in the figure.

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  16. Haemoglobin was found to contain- 0.335% iron (atomic weight of Fe = 5...

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  17. Show that if uncentainty in position and velocity are equal then uncer...

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  18. The shortest wavelength of H atom in Lyman series is x, then find the ...

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  19. Explain why PbCl4 is a good oxidising agent.

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  20. CO has both -oxidising and reducing property— explain.

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