Q68.The sum of coefficients of integral powers of x in the binomial expansion of (1 −2√x) 50 is (1) 2 1 (250 + 1) (2) 12 (350 + 1) (3) 1 2 (350) (4) 12 (350 −1)
What This Question Tests
This question requires identifying terms with integral powers of x in a binomial expansion involving a square root and then applying properties of binomial coefficients to find their sum.
Concepts Tested
Formulas Used
Binomial expansion (a+b)^n
Sum of coefficients properties (e.g., (1+x)^n + (1-x)^n)
📚 NCERT Sections This Tests
12.5 — A Hydrogen Atom Initially In The Ground Level Absorbs A Photon,
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12.5 A hydrogen atom initially in the ground level absorbs a photon, which excites it to the n = 4 level. Determine the wavelength and frequency of photon.
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Chemistry Class 11 · Chapter 1
1.3 Define the following terms: (i) Mole fraction (ii) Molality (iii) Molarity (iv) Mass percentage.
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5.12 Write all the geometrical isomers of [Pt(NH3)(Br)(Cl)(py)] and how many of these will exhibit optical isomers?
📋 Question Details
- Chapter
- Binomial Theorem
- Topic
- Binomial coefficients
- Year
- 2015
- Shift
- 04 Apr
- Q Number
- Q68
- Type
- MCQ
- NCERT Ref
- Class 11 Mathematics Ch 8: Binomial Theorem
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