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UNITED BOOK HOUSE-MODEL QUESTION PAPER 2-EXERCISE
- Write two limitations of Bohr’s theory.
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- [SiF6]^(2-) is known but [SiCI6]^(2-) is not. Give reasons.
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- Complete the following reactions :B2H6+3O2 rarr
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- Complete the following reactions :Na2B4O7+7H2O rarr
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- Write the structural formula of 3, 4, 4,5-tetramethylheptane.
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- Arrange the following in decreasing order of -I effect:-I, -Br, -Cl, -...
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- Why (CH3)3 overset ((+))(C) is more stable than overset ((+))(CH3) ?
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- Briefly mention the role of ozone present in stratosphere in protectin...
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- Calculate the uncertainty in velocity of a moving object of mass 25 g,...
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- Which series of lines of the hydrogen spectrum lies in the visible reg...
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- Nitrogen has positive electron gain enthalpy.Explain.
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- Arrange Mg, Al, Si and Na in the increasing order of their ionisation ...
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- What are the characteristics of the transition elements and why are th...
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- Between Fe^2+ and Fe^3+ which is smaller in size?
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- ortho-nitrophenol is less soluble is water than p- and m-nitrophenols ...
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- Determine the number of sigma and pi bonds in sulphuric acid.
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- In case of CO3^(2-) ion,all the C-O bond lengths are equal explain.
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- Define co-ordination number.
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- Density of a gas is founded to be 5.46 g//dm^3 at 27^@C and at 2 bar p...
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- Critical temperature of NH3 and CO2 are 405.5 K and 304.10 K respectiv...
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