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Walking in a straight line and riding a bicycle are the activities which are possible due to a part of the brain. Choose the correct location and name of this part from the given options :-
a) Forebrain --> Cerebrum
b) Midbrain --> Hypothalamus
c) Hind brain --> Cerebellum
d) Hind brain --> Medulla
Answer of previous question is
b) 1 is displacement reaction and 2 is a double displacement reaction
🖋Consider the following chemical reaction 1 and 2
1. Mg + 2HCl ---> MgCl2 + H2
2. NaOH + HCl ----> Nacl +H2O
The correct statement about these equations is :
a) 1 is a displacement reaction and 2 is a decomposition reaction
b) 1 is a displacement reaction and 2 is a double displacement reaction.
c) Both 1 and 2 are displacement reaction
d) Both 1 and 2 are double displacement reaction
[ Board exam 2023]
Answer of previous question is
b) 2.{ZnO} and 3.{Al2O3}
🖋 Metal oxides generally react with acids, but few oxides of metal also react with bases. Such metallic oxides are :
1.MgO 2. ZnO
3.Al2O3 4. CaO
a) 1 and 2
b) 2 and 3
c) 3 and 4
d) 1 and 4
[Board exam 2023]
Question 1 - A current of 1 A is drawn by a filament of an
electric bulb. Number of electrons passing through a cross
section of the filament in 16 seconds would be roughly
(a) 1020
(b) 1016
(c) 1018
(d) 1023
Question 2 - What is the maximum resistance which can be
made using five resistors each of 1/5 Ω?
(a) 1/5 Ω
(b) 10 Ω
(c) 5 Ω
(d) 1 Ω
Question 3 - What is the minimum resistance which can be
made using five resistors each of 1/5 Ω?
(a) 1/5 Ω
(b) 1/25 Ω
(c) 1/10 Ω
(d) 25 Ω
Question 4 -A cylindrical conductor of length l and uniform
area of cross section A has resistance R. Another conductor of
length 2l and resistance R of the same material has area of
cross section
(a) A/2
(b) 3A/2
(c) 2A
(d) 3A
Question 5 - The resistivity does not change if
(a) The material is changed
(b) The temperature is changed
(c) The shape of the resistor is changed
(d) Both material and temperature are changed
Question 6 - In an electrical circuit two resistors of 2 Ω and 4 Ω
respectively are connected in series to a 6 V battery. The heat
dissipated by the 4 Ω resistor in 5 s will be
(a) 5 J
(b) 10 J
(c) 20 J
(d) 30 J
Question 7 - In an electrical circuit two resistors of 2 Ω and 4 Ω
respectively are connected in parallel to a 6 V battery. The heat
dissipated by the 4 Ω resistor in 5 s will be
(a) 45 J
(b) 20 J
(c) 60 J
(d) 35 J
Solve krke answer comment kar do
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Last 10 yrs PYQs uploaded here soon. Who want this give your reaction 👍
Q.1. During respiration exchange of gases take place in
(a) trachea and larynx
(b) alveoli of lungs
(c) alveoli and throat
(d) throat and larynx
Answer
Q.2. Blood from superior vena cava flows into
(a) right atrium
(b) right ventricle
(c) left atrium
(d) left ventricle
Answer
Q.3. The green colour of plants is due to the presence of
(a) chlorophyll
(b) carotene
(c) xanthophyll
(d) starch
Answer
Q.4. The correct sequence of anaerobic reactions in yeast is [NCERT Exemplar]
Answer
Q.5. Lipase acts on
(a) amino acids
(b) fats
(c) carbohydrates
(d) all of these
Answer
Q.6. Blood consist of what fluid medium?
(a) Lymph
(b) Platelets
(c) Plasma
(d) All of these
