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WorksheetsM2 T2 Senior
Total questions: 25
Worksheet time: 13mins
From a group of 7 men and 6 women, five persons are to be selected to form a committee so that at least 3 men are there on the committee. In how many ways can it be done?
564
645
735
756
In how many different ways can the letters of the word 'LEADING' be arranged in such a way that the vowels always come together?
360
480
720
5040
In how many different ways can the letters of the word 'CORPORATION' be arranged so that the vowels always come together?
810
1440
2880
50400
How many 3-digit numbers can be formed from the digits 2, 3, 5, 6, 7 and 9, which are divisible by 5 and none of the digits is repeated?
5
10
15
20
In how many ways can a group of 5 men and 2 women be made out of a total of 7 men and 3 women?
63
90
126
45
Herculaneum and its harbor were buried under _________ lava.
liquid
solid
flowing
gas
The poisonous gases were not _________ in the air.
able to float
visible
able to evaporate
invisible
Scientists analyzed data about Vesuvius in the same way that a zoologist _________ a specimen.
describes in detail
studies by cutting apart
photographs
chart
_________ have concluded that the volcanic eruption caused a tidal wave.
Scientists who study oceans
Scientists who study atmospheric conditions
Scientists who study ash
Scientists who study animal behavior
Scientists have used _________ water to wash away volcanic ash from the skeletons of victims.
bottled
volcanic
purified
sea
Which of the following is the product for the reaction of
i. CH3CH2MgBr
CH3CHO ------------------->
ii. H+ / H2O
CH3COCH2CH3
CH3CHBrCH2CH3
CH3CH2CH2CH2OH
CH3CH(OH)CH2CH3
Compound C easily undergoes hydrolysis to form compound D, which forms methylpropene when heated with concentrated sulphuric acid. Using the information above, proposed the structural formula for compound C.
CH3CH2CH(Br)CH3
Arrange the compounds of the following series in order of their increasing acidity.
Water, Phenol, Ethanol, 2-propanol
Ethanol, 2-propanol, water, Phenol
2-propanol, Ethanol, water, Phenol
water, Phenol Water, Phenol, Ethanol, 2-propanol
Phenol, water, Ethanol, 2-propanol
The product formed when an ethylbenzene is refluxed with acidic potassium (VII) manganate is
C6H5CHO
C6H5COOH
C6H5CH2OH
C6H5CH2COOH
When bromine is added to phenol, the brown colour of bromine is decoulourised and white precipitate of 2,4,6-tribromophenol is formed. This is an example of
Nucleophilic substitution
Free radical substitution
Electrophilic substitution
Electrophilic addition.
The set of instructions for how to add two numbers is an example of the____ structure.
Control
Repetition
Selection
Sequence
The instruction “if it’s raining outside, then take an umbrella to work” is an example of the ____ structure.
Control
Repetition
Selection
Sequence
The first step in the problem-solving process is to __________.
Plan the algorithm
Analyse the problem
Desk-check the algorithm
Code the algorithm
Programmers refer to the items needed to reach a problem’s goal as the _______.
Input
Output
Processing
Purpose
_______ use standardized symbols to represent an algorithm.
Flowchart
Flow diagrams
IPO chart
Pseudocode
The energy of a photon is directly proportional to
Period
Frequency
Wavelength
Amplitude
The currents recorded by an oscilloscope in an experiment involving an a.c. circuit are – 2 A, 5 A, 3 A and – 4 A. What is the root mean square of the current?
1.0 A
3.7 A
4.0 A
7.3 A
What is the condition for a series RLC circuit to oscillate at resonant frequency?
The peak voltage across the resistor and capacitor must be equal.
The peak voltage across the resistor and inductor must be equal.
The peak voltage across the capacitor and inductor must be equal.
The peak voltage across the resistor, capacitor and inductor must be equal.
An a.c. source of 12 V, 50 Hz is connected to a capacitor and a 100 Ω resistor in series. If the current flowing through the circuit is 50 mA, what is the voltage across the capacitor?
5.0 V
6.0 V
10.9 V
12.0 V
When an object is located at the focus of a convex lens, the image formed is
Upright
Inverted
Diminished
Same size as the object
