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Question 161
StructuredStandard5 marks
CBSE Class 11 Mathematics · Straight Lines · Slope and inclination

Locate the point on the x-axis that is equally distant from (7,6) and (3,4).

Question 162
StructuredStandard5 marks
CBSE Class 11 Mathematics · Sequences and Series · Sequences

Write the first five terms of aₙ=(2n−3)/6.

Question 163
StructuredStandard4 marks
CBSE Class 11 Mathematics · Binomial Theorem · Binomial expansion

Expand (\(\frac{x}{3}\)+\(\frac{1}{x}\))^5 completely, for x≠0.

Question 164
StructuredStandard4 marks
CBSE Class 11 Mathematics · Linear Inequalities · One-variable inequalities

Complete every requested part of exercise 5.1, question 4: Determine all admissible values for 3x + 8 >2, when (i) x is an integer. (ii) x is a real number. Solve the inequalities in Exercises 5 to 16 for real x.

Question 165
StructuredStandard4 marks
CBSE Class 11 Mathematics · Relations and Functions · Cartesian products

Test the statements:

  1. For \(P=\{m,n\}\), \(Q=\{n,m\}\), \(P\times Q=\{(m,n),(n,m)\}\).
  2. For non-empty \(A,B\), \(A\times B\) consists of ordered pairs \((x,y)\) with \(x\in A,y\in B\) and is non-empty.
  3. If \(A=\{1,2\},B=\{3,4\}\), then \(A\times(B\cap\varnothing)=\varnothing\).
Question 166
StructuredStandard6 marks
CBSE Class 11 Chemistry · Hydrocarbons · Alkenes, alkynes and ozonolysis

Give IUPAC names of the products obtained by the ozonolysis of the following compounds : (i) Pent-2-ene (ii) 3,4-Dimethylhept-3-ene (iii) 2-Ethylbut-1-ene (iv) 1-Phenylbut-1-ene HYDROCARBONS 327

Question 167
StructuredStandard6 marks
CBSE Class 11 Chemistry · Organic Chemistry: Some Basic Principles and Techniques · Structure, representation and nomenclature

Name these independently described structures by IUPAC rules:

(a)
n-propylbenzene
(b)
NC–CH₂–CH(CH₃)–CH₂–CH₃
(c)
a heptane chain bearing methyl groups at C-2 and C-5
(d)
CH₃CH₂C(Br)(Cl)CH₂CH₂CH₃
(e)
ClCH₂CH₂CH₂CHO
(f)
Cl₂CHCH₂OH.
Question 168
StructuredStandard4 marks
CBSE Class 11 Chemistry · Redox Reactions · Oxidising and reducing behaviour

Fluorine reacts with ice and results in the change: H2O(s) + F2(g) → HF(g) + HOF(g) Justify that this reaction is a redox reaction.

Question 169
StructuredStandard4 marks
CBSE Class 11 Chemistry · Equilibrium · Equilibrium constants and reaction quotient

Give the expression for the equilibrium constant, Kc for each of the following reactions: (i) 2NOCl (g) 2NO (g) + Cl2 (g) (ii) 2Cu(NO3)2 (s) 2CuO (s) + 4NO2 (g) + O2 (g) (iii) CH3COOC2H5(aq) + H2O(l) CH3COOH (aq) + C2H5OH (aq) (iv) Fe3+ (aq) + 3OH– (aq) Fe(OH)3 (s) (v) I2 (s) + 5F2 2IF5

Question 170
McqStandard3 marks
CBSE Class 11 Chemistry · Thermodynamics · Thermodynamic terms and the first law

For methane combustion, ΔU°=−X kJ mol⁻¹. Compare ΔH° with ΔU°.