Skip to main content

CTET Sample paper "Science"

CBSE ADDA                      CTET Sample paper "Science"
81. Following passage carefully and pick out the best answer out of the our choices given in the questions that follow.81. Clothes do not dry quickly on a rainy day because on a rainy day—
(A) Humidity is high
(B) Humidity is low
(C) Temperature becomes high
(D) Atmospheric pressure rises

82. Joule is the unit of—
(A) Force
(B) Power
(C) Energy
(D) Pressure

83. The audible range of hearing for average human beings is—
(A) 20 Hz to 20 KHz
(B) 2 Hz to 20 Hz
(C) 2 Hz to 20 KHz
(D) 2 KHz to 20 KHz

84. Tritium is an—
(A) Isobar of Hydrogen
(B) Isotope of Hydrogen
(C) Isobar of helium
(D) Isotope of helium

85. Which of the following ions helps in the
opening and closing of stomata ?
(A) Na+
(B) K+
(C) Ca++
(D) None of the above

86. Which of the following does not have plus (+) or minus (–) signs marked on it ?
(A) Resistor
(B) Ammeter
(C) Voltmeter
(D) Battery

87. Photosynthesis is a—
(A) Catabolic process
(B) Anabolic process
(C) Amphibolic process
(D) All of these

88. If a mirror forms an erect but diminished image of an object placed anywhere infront of it, is a—
(A) Concave Mirror
(B) Plane Mirror
(C) Convex Mirror
(D) Concave and convex Mirror (both)


89. The instrument to measure atmospheric pressure is called—
(A) Pyrometer
(B) Thermopile
(C) Barometer
(D) Manometer

90. Orange colour of the setting sun is due to—
(A) Reflection of light
(B) Diffusion of light
(C) Scattering of light
(D) Polarisation of light

91. What is the final colour of blue litmus when a dilute solution of NaOH is added to it ?
(A) Red
(B) Pink
(C) Orange
(D) Blue

92. Pick the odd one out—
(A) Fermentation
(B) Aerobic Respiration
(C) Anaerobic Respiration
(D) Breathing

93. Hypotonic solution as compared to Hypertonic solution has—
(A) More solute
(B) Less solute
(C) Same solute
(D) Nothing can be said about the amount of solute

94. Volt is the unit of—
(A) Charge
(B) Current
(C) Resistance
(D) Potential difference

95. Two resistors having resistances of 1 ohm and 2 ohms respectively are connected is series with a battery. The current through the 2 ohms resistor is 2 amperes. The current through the 1 ohm resistor will be—
(A) 0·5 amp
(B) 1 amp
(C) 2 amp
(D) 4 amp

96. The addition of which one of the following will decrease the pH value of water ?
(A) Caustic Soda
(B) Baking soda
(C) Salt
(D) Hydrochloric acid

97. The branch of science that deals with tumours is—
(A) Osteology
(B) Anatomy
(C) Oncology
(D) Urology

98. Pneumonia is a disease associated with—
(A) Liver
(B) Lungs
(C) Gums
(D) Kidney

99. ‘Decibel’ is a measure of—
(A) Time
(B) Distance
(C) Intensity of sound
(D) Energy

100. Which of the following have the highest frequency ?
(A) Heat waves
(B) Sound waves
(C) Ultraviolet rays
(D) Gamma rays
Answers with Explanation :
81. (A) 82. (C) 83. (A) 84. (B) 85. (B) 86. (A) 87. (C) 88. (C) 89. (C) 90. (C) 91. (D)
92. (A) Fermentation is an enzymatic transformation of organic substracts. Rest three do not need enzymatic transformation.
93. (B) 94. (D)
95. (C) In series connection same current flows through all the resistances.
96. (D) 97. (C) 98. (B) 99. (C) 100. (D)
Part-B

Comments

CBSE ADDA :By Jsunil Sir : Your Ultimate Destination for CBSE Exam Preparation and Academic Insights

Class 10 Chapter 02 Acid Bases and Salts NCERT Activity Explanation

NCERT Activity Chapter 02 Acid Bases and Salt Class 10 Chemistry Activity 2.1 Indicator Acid Base Red litmus No Change Blue Blue Litmus Red No change Phenolphthalein Colourless Pink Methyl Orange Pink   Yellow Indictors are substance which change colour in acidic or basic media. Activity 2.2 There are some substances whose odour changes in in acidic or basic media. These are called olfactory indicators. Like onion vanilla, onion and clove. These changes smell in basic solution. Activity 2.3 Take about 5 mL of dilute sulphuric acid in a test tube and add few pieces of zinc granules to it. => You will observe bubbles of hydrogen gas on the surface of zinc granules. Zn + H2SO4 --> ZnSO4 + H2 => Pass the Hydrogen gas through the soap solution. Bubbles formed in the soap solution as Hydrogen gas it does not get dissolved in it

Living science ratna sagar class 6 solutions

Ratna sagar living science 6 answers by jsunil. Class6 Living science solution Term-1 Living Science Solution chapter-1 Source of food Download File Living Science Solution chapter-2 Component of food Download File Living Science Solution chapter-3 Fibre to fabric Download File Living Science Sol ch-4 Sorting of material into group Download File Living Science Soln ch-5 Separation of substance Download File Living Science Solution chapter-6 Change around Us Download File Living Science Solution ch-7 Living and Non Living Download File Living Science Solution ch-8 Getting to Know Plants Download File Living Science Sol ch-9 The Body and Its movements Download File Visit given link for full answer Class6 Living science solution Term-II

Class 10 Metal and Non MetalsChapter 03 NCERT Activity Solutions

X Class 10 NCERT Activity Explanation Class 10 Metals and Non Metals Activity 3.1 Page No. 37 Take samples of iron, copper, aluminium and magnesium. Note the appearance of each sample. They have a shining surface. Clean the surface of each sample by rubbing them with sand paper and note their appearance again. They become more shiny. => Freshly cut Metal have shiny surface Activity 3.2 Page No. 37 Take small pieces of iron, copper, aluminium, and magnesium. Try to cut these metals with a sharp knife and note your observations. They are very hard to cut. Hold a piece of sodium metal with a pair of tongs and try to cut it with a knife. Sodium can be cut easily with knife. Hence K and Na are soft metal cut with knife Activity 3.3 Page No. 38 Take pieces of iron, zinc, lead and copper try to strike it four or five times with a hammer. These metals are beaten into thin sheet on hammering. This property of metal is called malleability and metals are called malleable. Activity 3.4 Page

CBSE I NCERT 10th Numerical Problem solved Reflection and reflection of light

Q. 1. A concave mirror of focal length 20cm is placed 50 cm from a wall. How far from the wall an object be placed to form its real image on the wall?  Solution: V= -50 cm F= -20cm From mirror formula 1/u = 1/f – 1/v = -1/20+ 1/50 = - 3/100  U = - 33.3 cm Therefore, the distance of the object from the wall x =  50 – u X = 50 – 33.3 = 16.7 cm. Q.2. An object is placed at a distance of 40cm from a concave mirror of focal length 15cm. If the object is displaced through a distance of 20 cm towards the mirror, By how much distance is the image displaced? Answer: Here f = - 15 cm, u = - 40 cm Now 1/f = 1/u + 1/v Then 1/v = 1/f – 1/u Or V= uf/u-f =( - 40 x -15)/25 = -24 cm Then object is displaced towards the mirror let u1 be the distance object from the Mirror in its new position. Then u1 = -(40-20) = -20cm If the image is formed at a distance u1 from the mirror then v1 = u1f/u1-f = -20X-15/-20+15 = -60 cm. = - 20 x-15/-20+15 = -60 cm. Therefor

Electricity numerical for class 10 CBSE Trend Setter 50 Problems

1. The current passing through a room heater has been halved. What will happen to the heat produced by it? 2. An electric iron of resistance 20 ohm draws a current of 5 amperes. Calculate the heat produced in 30 seconds. 3. An electric heater of resistance 8 ohm takes a current of 15 A from the mains supply line. Calculate the rate at which heat is developed in the heater. 4. A resistance of 40 ohms and one of 60 ohms are arranged in series across 220 volt supply. Find the heat in joules produced by this combination in half a minute. 5. A resistance of 25 ohm is connected to a 12 V battery. Calculate the heat energy in joules generated per minute. 6. 100 joules of heat is produced per second in a 4 ohm resistor. What is the potential difference across the resistor? 7. An electric iron is connected to the mains power supply of 220 V. When the electric iron is adjusted at minimum heating’ it consumes a power of 360 W but at ‘maximum heating’ it takes a power of 840 W. Ca